How do you do calculations using log tables?

 Let us see how we proceed with the following calculation using log and anti-log tables.

Look at the calculation below:

 

So, first let us convert all the numbers in the calculation up to a maximum of 4 significant figures, with only a single digit before the decimal point, i.e., it will be as below:

Let us say the value of the calculation is = n.

That implies,  

Now, we need to extract the n value by taking the anti-logarithm. 

So, the value of the given calculation is = 8.563 x 10^1 = 85.63.