There are 16 cups in a gallon. Convert gallons into cups:

34 guests ate 2 and 1/2 cups of ice cream. To find the total amount of ice cream they ate, multiply the cups eaten by each guest by the amount of guests.

Subtract the total amount the guests ate by the amount of cups provided.

There are 2 cups in a pint. To convert cups into pints, divide the cups by 2.

There are
29 and a half pints of ice cream left over from the party.