Answer:
B. 17 * unknown number = 323
Explanation:
Let's call the unknown number n. Thus 323 / 17 = n
Since we know that 323 / 17 = n, we get 323 by multiplying 17 and n.
Thus, our answer is B.
Other example: Let's use 20 / 4 as an example. We know that 20 / 4 = 5. Thus, 4 * 5 = 20, where 5 is the answer to division problem but one of the products in the multiplication problem.