A rectangular piece of land is 17.5 meters long and 10.7 meters wide. The long side is close to the wall, and the other three sides need to be weaved with fences. How long should we weave the fence?
一块长方形地长17.5米，宽10.7米，长边靠墙，其余三边要用篱笆编上，要编多少长的篱笆？
<gadget id="calculator">10.7 * 2</gadget>
<output>21.4</output>

<gadget id="calculator">17.5 + 21.4</gadget>
<output>38.9</output>

<result>38.9</result>