Is there a word for to the 4th power?
There isn't a common single word for "to the 4th power" like "squared" or "cubed"; it is generally referred to as "to the fourth power" or "to the power of four." To calculate 3 to the fourth power, you multiply 3 by itself four times. This operation is 3 * 3 * 3 * 3, which equals 81.