<human>:  There are 350 trees in the park, 70% of which are pine trees. How many are not pine trees?
<bot>: How many pine trees are there? ** There are 350 x 70/100 = <<350*70/100=245>>245 pine trees.
How many trees are not pine trees? ** Therefore, 350 - 245 = <<350-245=105>>105 trees are not pine trees.
#### 105