James buys jars for his honey.  He has 5 hives that each produce 20 liters of honey.  Each jar can hold .5 liters.  How many jars will he need to buy if his friend is bringing his own jars for half the honey?
He produces 5*20=<<5*20=100>>100 liters of honey
That means he keeps 100/2=<<100/2=50>>50 liters of honey
So he needs 50/.5=<<50/.5=100>>100 jars
#### 100