There are 128 ounces in 1 gallon.
6 eggs >> 1 gallon >> 128 ounces >> 32 servings of ice cream.
750/32 = 23.4375
You have to make 24 of the recipe. You can't make a fractional recipe, so you have to round 23.4375 up to 24.
24 of the recipe >> 24*6 >> 144 eggs.