Question

What is the product of 2 power101 and 5
Power 99

Answer 1

The answer is quite simple and it goes like this:

(2^101) *5^99 = ((2*5)^99) *4

Which gives us:

(10^99)*4

The power to which 10 is raised indicates the number of its zeroes. We'll have 99 zeroes+a 4 at the beggining, so a round 100 digits.