To determine the amount of flour and sugar needed to make 4 loaves of bread, you can multiply the quantities specified in the recipe by 4.
For 4 loaves of bread: Flour: 4 1/2 cups x 4 = 18 cups of flour
Sugar: 1/4 cup x 4 = 1 cup of sugar
To make 4 loaves of bread, you would need approximately 18 cups of flour and 1 cup of sugar.