Enter any two values and the third will be calculated
Voltage: V = R × I
Voltage: V = P ÷ I
Power: P = V × I
Current: I = P ÷ V
Power: P = V2 ÷ R
Example: The resistance of a heater is 65Ω and the power supply is 220V. Find its power
（220×220）÷65=744W
