Which equation is equivalent to 0.002 x 4.8 x 10⁶/1.6x10-²

International calls require the use of a country code. many country codes a 3-digit numbers. country codes do not begin with a 0 or 1. there are no restrictions on the second and third digits. how many different 3-digit country codes are possible?

8000 + 8800 + 8000 + 8 million + 80 trillion + another a katrillion equals

I’m still confused on how to work the percentages