If you count aplate that has 32 colonies on it from the 1:100,000 dilution tube and you plated it with 10 um (microliters), what is the cell

If you count a plate that has 32 colonies on it from the 1:100,000 dilution tube and you plated it with 10 um (microliters), what is the cell concentration per milliliter in the original sample? Please explain out on paper, do the math explaining it in detail please. Thank you.