This method requires you to use prime factorization. Basically you break down these numbers into factors that---when multiplied together---equals the original number. For a, you can break the number into 8*10 and they still multiply together to equal 80. But this is not prime factors because you can break them down further. You have to continue doing this until you get prime numbers. For a, you get (2^3)x(5) and for b, you get (3^3)x(2)=54
