Question

Do the products 40 times 500 and 40times 600 have the same number of zeros?

Answer 1

No. 500 has more zeros than 600.

Answer 2

No, because:
40 * 600 = 4*6*10^3 = 24,000 = 2.4 * 10^4

While: 
40 * 500 = 4*5*10^3 = 20,000 = 2 * 10^4