Seeing Tony's confident and in-control demeanor, Chen Yu stopped asking about Natasha.

Anyway, even if Tony messed up, Natasha couldn't do anything to him.

Perhaps if Tony encountered any danger, S.H.I.E.L.D. agents would even have to step in and rescue Tony Stark.

After all, Tony Stark's status was extraordinary, and S.H.I.E.L.D. couldn't easily manipulate him.

Since Tony was interested in the organization behind Natasha, let him continue digging.

Maybe he'd accidentally uncover Hydra ahead of time?

Though the possibility was slim.

Chen Yu now suspected that Natasha's appearance was too coincidental; S.H.I.E.L.D. was probably not just monitoring Tony, but also had intentions towards him.

It would be better to quickly have Tony settle the final payment and leave this place.

Even if S.H.I.E.L.D. was incredibly capable, they couldn't track him across worlds, could they?

Watching Tony continue to fiddle with the briefcase, like a big boy with a new toy, constantly stuffing laboratory items into it, and then taking them out and putting them back in, Chen Yu had to remind him: "Tony, since I've brought the suitcase, shouldn't we settle the bill?"

"Settle the bill?" Tony placed the briefcase on the table. "Indeed, it wasn't easy for you to come all this way, and you even helped me deal with Obadiah along the way. I can't let you make a trip for nothing. How much do you plan to sell this briefcase for?"

"100 of these gold bars."

Chen Yu pulled out a gold bar from his Serenitea Pot, indicating that he needed to be paid with gold bars of that specification.

Smuggling across worlds and only making five times the profit, he was still too kind.

"100?" Tony glanced at the gold bar in Chen Yu's hand and shrugged. "Why do you want this stuff? This isn't worth much now. How much is 100 of them worth? Especially with the global financial crisis recently, gold is depreciating quickly. The gold stock market is currently all red. Are you sure you want to be paid in gold? How about I suggest a different payment method?"

"What suggestion?"

Chen Yu didn't think Tony, the big rich man, couldn't afford this money, but he was also curious about Tony's suggestion.

"I will be acquiring all of Obadiah's shares in Stark Industries. He currently holds about twenty-five percent of the shares. How about we split it fifty-fifty after I successfully acquire them?"

Twelve and a half percent of Stark Industries' shares?

Although Chen Yu knew that Stark Industries was extremely wealthy, with business operations spanning aerospace, military, medical, security, and other high-tech industries, making it one of the largest and most advanced multinational corporations in the world.

But Chen Yu truly didn't know how rich Stark Industries actually was.

So he tentatively asked, "Tony, can you tell me what the market value of Stark Industries is?"

"I don't know, I haven't really paid much attention to it. For me, as long as there's enough money, it's fine," Tony said casually. "I'd estimate Stark Industries' market value is around four trillion, maybe a bit higher, maybe a bit lower. If you really want to know, ask Pepper later, she knows much more than I do!"

Is this what truly rich people are like?

Not caring at all about how much asset value his Stark Industries actually had.

If Stark's total value was calculated at four trillion, then twelve and a half percent would be... exactly five hundred billion?

That's five hundred billion little goals? And in US dollars?

No matter how much Chen Yu tried to suppress the excitement in his heart, a brilliant smile couldn't help but appear on his face.

Saying he didn't like money, that was all false.

Only when he actually held it in his hands did he realize how much he loved money.

No matter which world, it's difficult to move an inch without money.

Especially for a spellcaster, how can you research Alchemy without burning money?

"Five hundred billion... five hundred billion... how should I spend this?"

Tony heard Chen Yu's mumble and wanted to remind him that the shares weren't calculated that way, that twelve and a half percent of the shares didn't equal five hundred billion US dollars, but seeing Chen Yu in such a joyous mood, he opened his mouth and then didn't tell him.

After all, a long, long time ago, Tony had lost the trouble of lacking money. Although he could understand why Chen Yu was so excited, he didn't understand it much.

He drank the last sip of beer, crushed the can flat with his hand, threw it into the laboratory's trash can, and shook his head somewhat helplessly.

When I gave you ten billion, your face wasn't that happy. Now that it's multiplied by 500, you're this happy?

"Oh, right, remember this phone number: 13xxxxxxxxx."

Chen Yu rattled off a string of digits for a phone number, telling Tony to remember it, and then asked for Tony's phone number.

Then he pulled out his phone from his system backpack and added Tony's phone number to his contacts.

"Given how generous you've been this time, if you ever have trouble in the future, call me. If I'm not busy, I'll come as soon as possible!"

After a period of exploration, Chen Yu also knew what changes had occurred to his phone after it was struck by lightning with him.

Besides being able to ignore Hogwarts' spell prohibiting the use of Muggle items, it also had an add friend function.

A page called 'Cross-World Communication' had been added to the contacts. As long as the other party's information was added to his phone number, they could call him across worlds.

Even if his phone showed no signal, it wouldn't prevent the other party from calling.

Only when the phone was out of battery would it not respond.

After multiple tests, even if Chen Yu threw his phone into his system backpack and entered his Serenitea Pot, his clone outside could still call his phone, which was in the system backpack.

This filled the gap of the system not having an add friend function.

Chen Yu felt this function was useful, but not overly so.

It would be more practical to have a store function installed in the phone.

But Chen Yu searched through all the apps on his phone and couldn't find any function that resembled a store system.

If there were a store system, even if he could only buy items he had already drawn, Chen Yu would buy out items like the Rebirth Cross and Senzu Beans.

Unfortunately, there wasn't one.

Tony looked at Chen Yu's phone and asked curiously, "You're not often in this world, so what's the use of me calling? Can you receive my calls in your world too?"

"Of course, as long as the phone has power, you'll definitely receive my call. If the phone happens to be out of battery, then you're on your own."

Saving Tony's phone number in his contacts meant he had added him as a friend.

"This phone can actually make cross-world calls? How does it do that? Did you cast some strange magic on it? Can I take it apart and look?"

Tony's hand involuntarily reached for Chen Yu's phone as he spoke.

Tony was indeed clueless about magic, but he was good with technology. This phone couldn't possibly be a magic item, could it?

Even if it was a magical construct, he was curious and really wanted to take it apart to see what black-tech magic was inside that allowed it to make cross-world calls.

"No!"

Chen Yu swatted away Tony's outstretched "pervert's hand" and immediately put his phone back in his system backpack.

His phone's new function was clearly a system-added feature and had nothing to do with the phone itself.

But Chen Yu also didn't want Tony to touch his phone. What if jarvis found the browsing history in the browser?

He'd be socially dead on the spot!

"Stingy. I'm giving you five hundred billion, and you're still reacting like this..."

"One thing at a time. This five hundred billion is for you buying the portable spatial equipment. If you want to take apart my phone and look, you'll have to add another five hundred billion!"

"Really?"

Tony felt that being able to witness the internal structure of a phone capable of cross-world communication would be worth another five hundred billion.

"Fake!"

Chen Yu rolled his eyes at Tony in annoyance.

Spending five hundred billion to see nothing, even if you're rich, you shouldn't waste it like that.

As Tony's friend, it's better not to let him spend such an exorbitant amount.

This is all for your and jarvis's sake, Tony. Don't be so ungrateful.

If jarvis discovered his phone's browser history, either he'd be socially dead, or they'd all die. One of those would happen.