We will use the same six steps to demonstrate the Deci-Point scales when used for division.

Step 1:
Using the front of the slide rule (like any other slide rule), we calculate the significant figures of the quotient 765 ÷ 234 arriving at the digits 327.

Step 2:
On the back of the slider, perform the same calculation using the condensed C and D scales (C' and D') on the right. We find that the result falls in region 0 (zero) for division.

Step 3:
Align the inverted triangle above the 0 (zero) on the RN-DZ scale.

Step 4:
Now we determine the requirements for the difference number (DN). SInce we have both numerator and denominator, we need to perform a similar calculation as for multiplication for each.

Numerator ...

1. Count the number of factors, F. In this case1, i.e. from 765.
2. The number of zeros, Z. In this case 0.
3. The number of digits, D. In this case 3, i.e. from 765.

Denominator ...

1. Count the number of factors, F. In this case1, i.e. from 0.000234.
2. The number of zeros, Z. In this case 3.
3. The number of digits, D. In this case 0.

Step 5:
Calculate the difference number (DN).

Numerator ... D - (F + Z) = 3 - (1 + 0) = +2
Denominator ... D - (F + Z) = 0 - (1 + 3) = -4

The difference number (DN) is calculated by subtracting the denominator value from the numerator value:

+2 - (-4) = +6

Step 6:
Below +6 on the DN scale, we locate +7 on the RN-DZ scale. Note that the slider has not been moved since the inverted arrow was aligned with 0 (zero) on the RN-DZ scale, step 3.

This value means that the result has 7 (seven) digits in front of the decimal point. Hence 3,270,000 is the answer to our calculation.

   Proceed to Combined Operation Example