Distribute Value by Hour

How can one distribute a cell value (A2) over the course of a number of hours (B2) using the inputs in column D of the attached? I provided an expected result but keep in mind that the cells in yellow need to be adjustable and I used 4 hrs in the example because the math is very simple to calculate. My issue is creating a formula that can work with the adjustable input cells and distribute the value in A2 by any given number of hours entered in B2 between 0 and 6.9.

I have been trying for hours on this even though it may seem simple to some...I would REALLY appreciate any help...and let me know if I can make this explanation any clearer.

Thanks,

D