Division of Fractions - Visual Dynamic Number Line Model

When we divide two numbers the quotient (answer) is less than the dividend : 15 divided by 3 is 5. But 15 divided by 1/2 is 30 which is more than 15. How can we explain to our learners? why does the answer (quotient) is bigger than the dividend ? isn’t dividing supposed to make the answer smaller?
Number Line Model can provide an insight into he above question