How Do I Expand the Divider?
When you want to build a 64 bit multiplier from 32 bit ones you can use the equation (a+b)*(c+d) = ac+bc+ad+bd 
You have four multiplications of 32 bit numbers for one 64 multiplication.

When you want to build a 64 bit divider from 32 bit ones the equation is (a+b)/(c+d) = a/(c+d) + b/(c+d) but this does not help much, you still have to divide 32 bits by 64 bits. You may try (a+b)/(c*d) = a/c/d + b/c/d but this is useful only if the divider may be split into two factors each smaller than 32 bits.

The properties of the division operation don't allow an expansion like that for multiplication.