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Yep Shelley; (Ignore this post if you're already aware …)
Further to Steven's post, the notation he's used is scientific notation:
10^0 = 1
10^1 = 10
10^2 = 100
10^3 = 1000
… etc, etc.
10^-1 = 0.1
10^-2 = 0.01
10^-3 = 0.001
… etc, etc
If you count up the zeros at the end of the big numbers, you'll find its the same count as the number following the '^' above. Similar for the little numbers .. the number of digits after the decimal point is the same as the number following the minus sign. (Just makes it a lot easier to work with the big and small numbers).
Cheers
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