Calculating 2 x 2 x 2 x 2 x 2 x 2 x 2 is quite easy and probably takes less time than writing it all out.

So we have invented a shortcut way of writing this out.

After checking that all the numbers are the same (here they are all 2s), count them up.

There are 7 here.

So instead of writing 2 x 2 x 2 x 2 x 2 x 2 x 2, we can write 2^{7}.

We read 2^{7} as 2 to the power of 7 or as 2 to the 7.

Remember, to work this out we keep multiplying by 2......

2, 4, 8, 16, 32, 64, 128

So 2^{7} = 128

**Be careful**

This has nothing really to do with the number 7 itself.

It is not the same as 2 x 7 = 14. This would be the answer to 2 + 2 + 2 + 2 + 2 + 2 + 2