human
John cuts his grass to 2 inches. It grows .5 inches per month. When it gets to 4 inches he cuts it back down to 2 inches. It cost $100 to get his grass cut. How much does he pay per year?
assistant
How many inches does John cut his grass? ** He cuts his grass 4-2=<<4-2=2>>2 inches
How many months does John get his grass cut? ** So he gets it cut every 2/.5=<<2/.5=4>>4 months
How many times does John get his grass cut? ** That means he gets it cut 12/4=<<12/4=3>>3 times a year
How much does John pay per year? ** So he pays 100*3=$<<100*3=300>>300 per year
#### 300