How many zeros will be in the products (6 x 5 )x 10 ^3

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

Write the equations in logarithmic form 9^4=6,561