This circuit is probably the most complicated circuit in our calculator. This circuit (as you can guess from its name) can covert a binary number to decimal. This circuit works with binary (like others) and can't be connected into series to add bits into the final circuit (like the multiplier). This circuit was created for demonstration purposes only, so it has only 4 bits and the max number you can get is 9 (1001bin -> 9dec). Although the circuit has just 4 bits, it has complicated scheme - A - D are inputs for binary number, 0 - 9 are ouputs (showing number in decimal)