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