I am looking for a formula that if the cell A1 and A2 match then cell A3 will
be 4
if they do not match then 0

example: A1 has YES and A2 has YES then cell A3 will be 4
IF both cells are blank the A3 would say 4
A1 has YES and A2 has NO then cell A3 will be 0
A1 has NO and A2 has YES then cell A3 will be 0

Is this possible?
Thanks