Translate this sentence into an equation. 135 is the product of Janelle's score and 9. Use the variable $j$ to represent Janelle's score.

Step 1 ：Translate this sentence into an equation: 135 is the product of Janelle's score and 9. Use the variable $j$ to represent Janelle's score.

Step 2 ：In mathematical terms, 'product' means multiplication. So, we can translate this sentence into an equation by setting 135 equal to 9 times Janelle's score, which we are representing with the variable $j$.

Step 3 ：The translated equation is \(\boxed{9j = 135}\).