Answer:
Since, the prime factors of 63 are 3, 7. Therefore, the product of prime factors = 3 × 7 = 21.
Step-by-step explanation:
Answer:

Step-by-step explanation:




Hope this helps.
Cuboid C is 4 and 4. Cuboid D is 2 and 4.
I believe the answer is 21
21 × 6 = 126
and both numbers are divisible by 3