There are 350 trees in the park, 70% of which are pine trees. How many are not pine trees?
There are 350 x 70/100 = 
<gadget id="calculator">350*70/100</gadget>
<output>245</output>
245 pine trees.
Therefore, 350 - 245 = 
<gadget id="calculator">350-245</gadget>
<output>105</output>
105 trees are not pine trees.

<result>105</result>