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 Counting to ten billion... on your fingers
 Counting by powers of ten

If these are your hands... palms up and thumbs out...
 ``` |||| |||| \|||| ||||/ OOOO OOOO OO OO ```
and these are a left-hand fist and right-hand finger & thumb...
 ``` | |/ OOOO OOOO OO OO ```
then...
 ``` one 100 1 OOOO OOOO OO OO "ten to the zero"``` ``` ten 101 10 / OOOO OOOO OO OO "ten to the one"``` ``` hundred 102 100 | |/ OOOO OOOO OO OO "ten to the two"``` ``` thousand 103 1000 || ||/ OOOO OOOO OO OO "ten to the three"``` ``` ten thousand 104 10000 ||| |||/ OOOO OOOO OO OO "ten to the four"``` ``` hundred thousand 105 100000 |||| ||||/ OOOO OOOO OO OO "ten to the five"``` ``` million 106 10 00000 | |||| | ||||/ OOOO OOOO OO OO "ten to the six"``` ``` ten million 107 100 00000 || |||| || ||||/ OOOO OOOO OO OO "ten to the seven"``` ``` hundred million 108 1000 00000 ||| |||| ||| ||||/ OOOO OOOO OO OO "ten to the eight"``` ``` billion 109 10000 00000 |||| |||| |||| ||||/ OOOO OOOO OO OO "ten to the nine"``` ``` ten billion 1010 100000 00000 |||| |||| \|||| ||||/ OOOO OOOO OO OO "ten to the ten"``` ``` ```

Multiplication adds fingers, and division removes them.
So multiplying by ten adds a finger, and dividing by 1000 removes three.
So what is a hundred times a hundred?

I'm not sure this is truely of any use.

 A View from the Back of the Envelope Comments encouraged. - Mitchell N Charity

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