Editing Slide rule (section)

====Future value of money====
The LLN scales can be used to compute and compare the cost or return on a fixed rate loan or investment.
The simplest case is for continuously compounded interest. Example: Taking D as the interest rate in percent,
slide the index (the "1" at the right or left end of the scale) of C to the percent on D. The corresponding value on LL2 directly below the index will be the multiplier for 10 cycles of interest (typically years). The value on LL2 below 2 on the C scale will be the multiplier after 20 cycles, and so on.