Resistor calculation: The calculator searches the values for the resistor pairs R1 and R2 from
the E24 range of preferred values, which build paralleled the known target resistance.
In the area of electronics design, accurate resistor values are needed, such as in active filters,
synthesizers, etc. These values are not to get with one resistor from the usual E24 range.
Calculating reverse engineering resistor pairs by hand is tedious and time consuming even
with a pocket calculator.