Answer:
The product is 

Explanation:
Given : Expression 

To find : Annex zeros to form the product?
Solution : 
Expression 

When we multiply any number with multiple of 10, then we will first multiply number by 1 and then put the the number of zero in multiple of 10.
So, multiply 61 by 1 and then add 3 zeroes to the product.

Therefore, The product is 
