Whats 300 over the power of two

I assumed you meant "What is 300 to the power of two," or 300².

We can think of exponents as repeated multiplication in the same way as we think of multiplication as repeated addition: Just as 300 · 2 means 300 + 300, 300² means 300 · 300.

When we work this out, we find that 300² = 300 · 300 = 90,000