Question

Twenty-seven is the product of three and a number

Answer 1

It’s the product of three and nine.

Answer 2

This situation can be modeled by an equal.

The word is means equal.

So 27=

The product means multiplication
27 = 3*

Then "a number" is an unknown (we'll call it x)

So the equation is
21=3*x
9=x

The number is 9