Jamal’s Back-to-School celebration was such a hit that the class President asked him to plan a s'mores event for their End-of Year celebration. Jamal wants to have the right
amount of all of the ingredients for the s’mores. He reads the packages and sees that
there are 40 large marshmallows per bag and each box of graham crackers has 30
crackers. He knows that a chocolate bar has 12 pieces in it and each s’more will be
allowed 1 piece. How many s'mores will he have to make to have no ingredients left over?