In such cases , the user may slide the upper scale to the left until its right index aligns with the 2 , effectively dividing by 10 ( by subtracting the full length of the C-scale ) and then multiplying by 7 , as in the illustration below : Here the user of the slide rule must remember to adjust the decimal point appropriately to correct the final answer .
In such cases , the user may slide the upper scale to the left until its right index aligns with the 2 , effectively multiplying by 0.2 instead of by 2 , as in the illustration below : Here the user of the slide rule must remember to adjust the decimal point appropriately to correct the final answer .