How to model a whole number divided by a fraction

Im not sure exactly what youre asking but I will give an example.

4 divided by 1/4

4/1 times 4/1 you flip the second term and switch to multiplication

numerator: 4 times 4 = 16

denominator: 1 times 1 = 1

the final answer would be 16

to check this you multiply 16 times 1/4 and you would get 4