The number 7 billion can be written in a number of ways, including:
7'000'000'000
7,000,000,000
Its 700 Billion or 7*10^8
7,600,000,000,000
3,000,400,700
7,000,000,000 is 7 billion
7'000'000'000
7,000,000,000
11,000,700,000
7 002 100 000
Its 700 Billion or 7*10^8
7 435 000 000 000
7,600,000,000,000
7 002 100 000
7 trillion 12 billion.
3,000,400,700
I write 620 billion as 620 billion.