So to solve this you can break it down like this: 54 = 2 times 27. Two is a prime number so leave that alone. Next, 27 is 3 times 9. Three is a prime so leave that alone. Then 9 = 3 times 3. And both threes are prime. So take all the prime numbers, and there you have it! 3 times 3 times 3 times 2. Or 3 to the 3rd power times 2. Hope I helped.