Multiply the number by itself three times
Use the formula: n³ = n × n × n
First square the number, then multiply the result by the same number
For a positive number, the cube is positive
For a negative number, the cube is negative
For a decimal, multiply it by itself three times the same way
Use a calculator if the number is large
Memorize cubes of small numbers for faster calculation
Break large numbers into parts and use algebraic identities if needed
Check the result by estimating its size against nearby cubes