<human>:  Bill is trying to figure out how many water bottles he needs to buy for his party. He started out with 2 cases of water which have 24 bottles each. He has 70 guests that will be arriving, and he wants to have 2 bottles of water for each guest. How many additional bottles of water will he need to buy?
<bot>: How many bottles of water does Bill have? ** Bill has 2 cases of 24 bottles each, so he has 24 * 2 = <<2*24=48>>48 bottles of water
How many bottles of water does Bill need? ** Bill needs enough water for 70 guests to have 2 bottles each, so he needs 70+70 = <<70+70=140>>140 bottles of water.
How many bottles of water does Bill need to buy? ** Bill needs 140 bottles of water and has 48, so he needs to buy 140- 48 = <<140-48=92>>92 bottles of water.
#### 92