In the tree planting activities, 360 trees were allocated to the fourth, fifth and sixth grades according to the ratio of 1:2:7. How many more trees did sixth grade plant than fifth grade?
在植树活动中，把360棵树按1：2：7分配给四、五、六三个年级．六年级比五年级多植了多少棵树？
<gadget id="calculator">1 + 2 + 7</gadget>
<output>10</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">360 * (7/10)</gadget>
<output>252</output>

<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">360 * (1/5)</gadget>
<output>72</output>

<gadget id="calculator">252 - 72</gadget>
<output>180</output>

<result>180</result>