A park is 1000 feet long and 2000 feet wide. If there is 1 tree per 20 square feet, how many trees are there in the park?
The park is 2,000,000 square feet because 1000*2000 =<<1000*2000=2000000>>2,000,000.
Thus, there are 100,000 trees in the park because 2,000,000/20 = <<2000000/20=100000>>100,000.
#### 100,000