Do you mean checking your work? In that case it would be 9*20.
To serve 3 you half the recipe so divide each number by 2
3/4 cup/2 = 3/8 cup granulated sugar
1 cup/2 = 1/2 cup of evaporated milk
1/3teaspoon/2 = 1/6 teaspoon of vanilla
12 slices/2 = 6 slices of French bread
=0.4237288136 ..... 0.423 | 7 +1 ~~ 0.424
