3 thousand million in number form is 3,000,000,000.
Three million is written in numbers as 3,000,000.
Three tenths of a million is 300,000
One million in number form is 1,000,000
80,000,000 is 80 million in number form.
28 million in number form is 28,000,000
19.8 million in number form is 19,800,000
378.8 million in number form is 378,800,000
2.79 million in number form is 2,790,000
You write million in number form by appending six zeroes to the number. So "two million" is 2,000,000 "Five million" is 5,000,000
0.32 million in number form is 320,000
1.4 million in number form is 1,400,000, and in word form is one million, four hundred thousand