Sasha heard that planting trees helps to reduce the local temperature. For each tree planted, the temperature drops .1 degree. A tree costs $6 to plant. If she got the local temperature to drop from 80 to 78.2, how much did it cost to plant the trees?
The temperature dropped 1.8 degrees because 80 -78.2 = 
<gadget id="calculator">80-78.2</gadget>
<output>1.8</output>
1.8.
She planted 18 trees because 1.8 / .1 = 
<gadget id="calculator">1.8/.1</gadget>
<output>18</output>
18.
It cost $108 to plant the trees because 18 x 6 = 
<gadget id="calculator">18*6</gadget>
<output>108</output>
108.

<result>108</result>