3 to the second power, often written as 3², is a mathematical expression that means 3 multiplied by itself.
To calculate it, you would perform the multiplication:
3 × 3 = 9
Therefore, 3 to the second power is equal to 9. This concept is part of exponentiation, where the number (the base) is multiplied by itself a certain number of times, indicated by the exponent (in this case, 2).