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cubed is when you times the number by itself 3 times e.g. 3times3times3=27=cubed
You multiply 21 times itself three times: 21 x 21 x 21 = 9,261.
Powers are how many times you multiply a number by itself. Three squared (or three to the second power) is the same as 3 times 3. Three to the third power is the same as 3 times 3 times 3. This can continue forever. For the record, three to the third power is equal to 27.
8 to the third power = 512 "To the third power" means the number times itself then times itself again (3 times the number). 8 X 8 = 64........ 64 X 8 = 512
You multiply three by itself three times: 3 x 3 x 3 = 27