Write 26,500,000 in scientific notation.

Note: even if you don't see a decimal at the end of a number, it's there.

First, move the decimal behind the 2, so you'll get a number between 1 and 10. Note that it takes 7 jumps to get there.

Now drop all non-significant zeros.

Multiply this by 10 to the power of 7, since the decimal was moved seven places.