Can the product of a whole number and a decimal number less than 1 ever be greater than a whole number

No. The product of a whole number and a decimal number less than 1 will be greater than the whole number multiplied into. For this theorem to be proven. Let us state the mathematical expression into numbers such that
1.  N x 0.1 = N/0.1 < N
2.  1 x 0.5 = 0.5
3.  2 x 0.1 = 0.2
4.  100 x 0.55 = 55 

These three examples and stances then suggest the claim that the product is not equal to the whole number used in the equation.