Answer: 2979 Zeroes
Explanation:
1. Figure out what 10^2985 is. (It's one followed by 2985 zeroes).
2. Using that knowledge, make 7.185629 a whole number. To do that, you need to multiply it by a number that has the same number of zeroes as it does to move the decimal place one by one to the right. In this case, it is 1,000,000, because it has 6 zeroes and you need to move the decimal point past 6 numbers (after 7 in 7.185629).
3. Subtract 2985 by 6, because you used 6 zeroes.
4. This gives you the answer 2979 zeroes because 2985 zeroes - 6 zeroes= 2979 zeroes.