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
39,804,733 (move 4 decimal places)
= 3980.4733
Try this multiplication and see if you make a mistake.
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-log-table-1.4df6ee6.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-log-table-2.d516bb3.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-anti-log-table-1.b0b0513.jpg)
![](/images/user/base/Maths/Logarithms/Reference%20Tables/reference-anti-log-table-2.f89189d.jpg)