fractions - How to illustrate "one divided by four"?

I was trying to create a video illustrating "one divided by four" by showing a circle being cut into four slices. However, I ran into a problem--namely once the circle had been cut into four slices, there were 4 one-fourths left on the screen.

My child says, "but why are there four one-fourths left if the answer is one-fourth?"

What has gone wrong in my illustration?

Here's a video I made to illustrate my problem if it's not clear.