Mammoth Memory

Logarithms – multiplying large numbers traditionally

Prior to the early 1970s, before students had calculators, it was incredibly difficult multiplying large numbers by hand without making a mistake.

For Example

69.31 x 57.43

69.31 x 57.43-01.jpg

39,804,733 (move 4 decimal places)

= 3980.4733

Try this multiplication and see if you make a mistake.

More Info