In the old times...........before calculators....................banks and business people would use log tables..........to multiply large numbers..

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Method 4 Multiplying Numbers Using Log Tables

1. Understand how to multiply numbers using their logarithms. ...
2. Look up the logarithms of the two numbers you want to multiply. ...
3. Add the two logarithms to find the logarithm of the solution. ...
4. Look up the anti-logarithm of the result from the above step to find the solution.

4 Clear and Easy Ways to Use Logarithmic Tables - wikiHow

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4 Clear and Easy Ways to Use Logarithmic Tables - wikiHow

https://www.wikihow.com/Use-Logarithmic-Tables

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Method 4. Multiplying Numbers Using Log Tables. Understand how to multiply numbers using their logarithms. Look up the logarithms of the two numbers you want to multiply. Add the two logarithms to find the logarithm of the solution. Look up the anti-logarithm of the result from the above step to find the solution.

A Practical Use For Logarithms, Part 2: How We Multiplied Large ...

https://qedinsight.wordpress.com/.../a-practical-use-for-logarithms-part-2-how-we-mu...

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Apr 22, 2011 - Using the multiplication algorithm would take a bit of time, but it's feasible. ... Now look up the logarithm of each of the numbers from a table.

Using logarithms to multiply & divide - YouTube

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https://www.youtube.com/watch?v=aTS4MJ8EZGo

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Sep 17, 2010 - Uploaded by Dusty Jones

Using logarithms to multiply and divide. ... How to use log tables/Logorithm tables. - Duration: 8:19 ...

ENGM2022 Long Multiplication Log Table - YouTube

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https://www.youtube.com/watch?v=XEtH06HdcGE

Jan 8, 2016 - Uploaded by Rod Naugler

A demonstration of using the Log Table to do large number multiplication.

Logarithms - Phy6

www.phy6.org/stargaze/Slog1.htm

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To multiply two numbers A an B using logarithms (the pre-calculator way): ---Find the logarithms of A and B, using tables. ---Using tables of "logs", find the number whose logarithm equals the sum. is the input and the table then leads you to the number.)