The expression 3 to the power of 4 can be calculated as follows:
3 to the power of 4 means you multiply the number 3 by itself a total of 4 times:
3 x 3 x 3 x 3.
Calculating that step by step:
1. The first multiplication is 3 x 3 = 9.
2. Then, multiply the result by 3: 9 x 3 = 27.
3. Finally, multiply by 3 again: 27 x 3 = 81.
Therefore, 3 to the power of 4 equals **81**.