Ohms Law is an easy way of working out current/voltage and resistance running through a component or a circuit.
V = Voltage
I = Current
R = Resistance
To use this chart place your thumb over the result your looking for let us say “I” V being above R means divide V by R the answer is your current (I)
If you put your thumb on “V” then you will notice that I and R are side by side so you Multiply I by R to get the Voltage “V”