1) 1.79×5.3=9.487 1.79 is one liter so 5.3 gallons is 9.487
2) 0.75 cups of blueberries for 1 batch You need 5 batches so........ multiply 0.75 by 5 0.75×5=3.75 you already have 2.5 cups of blueberries So you need to find out how much you need to buy subtract 2.5 from 3.75 3.75-2.5=1.15