update Readme

Readme.md

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 # R-Calc
 
-R-Calc is a tool designed to calculate resistor networks aiming to approximate a given equivalent resistance as closely as possible.
-
-Currently under development!:
 [Try R-Calc on Github Pages](https://mitchilaser.github.io/R-Calc/)
 
+R-Calc is a tool designed to calculate resistor networks aiming to approximate a given equivalent resistance as closely as possible.
+
 ## Example
 
 Suppose you require a 608kΩ resistor, but the closest available option in the E24 resistor series is 604kΩ. R-Calc can help find combinations of resistors to achieve a resistance close to 608kΩ:
 
-|         Resistor combination         | deviation |
-|:------------------------------------:|:---------:|
-|         150kΩ + 470kΩ = 620kΩ        |    1,9%   |
-|   330kΩ + (470kΩ ∥ 680kΩ) = 607,9kΩ  |   0,014%  |
-| 68kΩ + 100kΩ + 220kΩ + 220kΩ = 608kΩ |   Exact   |
+| Resistor combination |     =     | deviation |
+|:--------------------:|:---------:|:---------:|
+|         620kΩ        |   620kΩ   |    1,9%   |
+|    620kΩ ∥ 30000kΩ   | 607,446kΩ |   0,091%  |
+|  1kΩ + 47kΩ + 560kΩ  |   608kΩ   |   Exact   |
+
+R-Calc iteratively combines two and later on three resistors, trying to find the closest value to approximate a target resistor. Once an exact approximation is reached, further calculations are unnecessary as additional resistors will not improve the approximation.
+
+## Future
 
-R-Calc iteratively combines two, three, or four resistors until it achieves a network with an acceptably close approximation to the specified replacement resistance. Once an exact approximation is reached, further calculations are unnecessary as additional resistors will not improve the approximation.
+Maybe, some time, this tool will also be able to calculate on networks with 4 resistors but this might take a while to implement and currently 3 resistors seem to be good enough for most purposes.