Answer:
2^2 * 3 * 7
Explanation:
First, divide by 2.
84 / 2 = 42
Divide by 2 again!
42 / 2 = 21
21 is divisible by 3, so divide by 3.
21 / 3 = 7
7 is prime, so we've reached the end of our little adventure!
84 = 2 * 2 * 3 * 7, or in exponents, 2^2 * 3 * 7.
Hope that helps!