25 x 25 x 25 = 15625
25
25x25x25=15625
25
15,625 is the cube of 25.
28
3 times 25 is 75. 25 times 25 times 25 is 15625.
If by "cube of 15625," you mean 156253, then you would multiply 15625*15625*15625. If you have to do this by hand, then first multiply 15625*15625, and then multiply the product of that by 15625 again. Follow the multi-digit multiplication rules, look it up if you don't know them.
A cube of 25 centimetres length is 25 x 25 x 25 = 15625 cm3 in volume.
x^6=15625 x=(15625)^(1/6)
The sixth root of 15625, or 15625 ^ (1/6) is equal to 5.
253 = 15625