The operation that is the inverse of multiplication is division.
When we multiply two numbers, we are essentially scaling one number by the other. Division, on the other hand, is about distributing a number into equal parts. For example, if you multiply 4 by 3, you get 12. To find the original number (4) from 12, you would divide 12 by 3, which gives you 4. Hence, division reverses the effect of multiplication, making it the inverse operation.