EX

20^15.

What you do is you seperate it into easier numbers.

20^2 which is 400.

That you can do 7 times.

so now you have 400^7×20^1

Now you do the 400^2, which is 160000.

Now you have 160000^3x400x20 (^1 is the number.)

Now you take 160000^2 which is 25600000000.

You now have 25600000000x160000x400x20.

400×20 is 800.

128000000 is the answer of 800×160000.

Now you have that 25600000000 times 128000000.

Now, if you haven’t been able to do this is the head like I am, then you need to get a calculator, or else get scratch paper.

That makes things easier.

Continuing:

25600000000×128000000 is basically 256×128 with 14 0’s at the end. 962800000000000000.

Its not that hard, you just have to break it up!