The expression $5^3$ means $5 \times 5 \times 5$. Let's calculate it:

$5^3 = 5 \times 5 \times 5 = 125$

So, $5^3 = 125$.

Would you like more details on exponents or have any questions?

Here are five related questions for further exploration:

1. What is $6^3$?
2. How do you simplify $5^4$?
3. Can you calculate $2^5$?
4. What is the value of $5^{-3}$?
5. What is the square root of 125?

Tip: Exponents represent repeated multiplication of a number by itself. The base is multiplied by itself as many times as indicated by the exponent.