<human>:  The area of a forest is three times the area of the square-shaped street. If the street has a length of 100 meters on one side and the number of trees per square meter in the forest is 4, calculate the total number of trees in the forest.
<bot>: How many square meters is the square-shaped street? ** Since the area of a square is sides squared, the area of the square-shaped street is 100*100 = <<100*100=10000>>10000 square meters.
How many square meters is the forest? ** The area of the forest is three times the area of the square-shaped street, a total of 3*10000 = <<3*10000=30000>>30000 square meters.
How many trees are in the forest? ** If the number of trees per square meter in the forest is 4, there are 4*30000 = <<4*30000=120000>>120000 trees in the forest.
#### 120000