6,000,000,000 (6 billion) people on Earth.

Assume there are approximately 6,000,000,000 (6 billion) people on Earth.
What would you estimate to be the result, if you multiply together the number of fingers on every person's left-hands? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.)
If you cannot estimate the number then try to guess how long the number would be ?

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Answer is 0
There will atleast will 1 person with no left hand and so he will have 0 fingers.
So 0 x anything = 0.


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