the product of a fraction and its reciprocal is____?_____

The product of a fraction and its reciprocal is 1.
For example we have a fraction $\frac{3}{4}$.
Then its reciprocal is $\frac{1}{{\displaystyle \frac{3}{4}}} = \frac{4}{3}$
So the product of the fraction and its reciprocal = $\frac{3}{4}\times \frac{4}{3} = 1$