Let zero be composed of the multiplicative identity property of 0
Let zero be composed of the multiplicative identity property of 1.
Let the use of the first property be denoted by z1 in an expression Let the use of the second property be denoted by z2 in an expression Let only one property be used in any binary expression of multiplication and division.
( A * 0 )
if A = 0 (z1for0) * 0 = 0 (z2for0) * 0 = 0
if A =/= 0 A * (z1for0) = 0 A * (z2for0) = A
Let numerators of zero always use the property of z1
Let divisors of zero always use the property of z2
If both numbers in a binary expression of division equal 0 then only the property of z1 is used.