To multiply numbers ending in zero, first, exclude the zeros from the numbers. Then, multiply the numbers without the zeros. Once you obtain the product of the numbers, place the zeros at the end.
For example: Take 210 × 4,000Excluding the zeros from the numbers, we get 21 and 4.Multiplying 21 by 4, we get 84.Now, place the total number of zeros from the original numbers ‘210’ and ‘4,000’ at the end of 84.In this case, 4 zeroes. We get 8,40,000. So, 210 × 4,000 = 8,40,000Try these