Here's a piece of advice: learn to read before you speak 😜

$USUAL they are lying to you. if there are 500 million, and there will be 4 billion, where the hell do they get that 10 million is missing. 3 billion five hundred million are missing.
4,000,000,000 - 500,000,000 = 3,500,000,000 ✔️
4,000,000,000 - 500,000,000 ≠ 10,000,000 ❌

they don't even know how to add.