formula to limit maximum value

hi guys,

i have a simple spreadsheet where i'm totalling a few values thru a formula. it's similar to this:

=D13*F13

i'm trying to create a funcion that says if d13 * f13 >= 300, i want the value to stay at 300 max and at the same time, if d13 * f13 < 300, i want the total to remain whatever it is.

i have been able to create both of these formulas successfully by themselves but i can't combine them. is this possible?

any help would be greatly appreciated!!