A rectangular vegetable field is 35 meters long and 10 meters wide. One short side of it is against the wall, and the other three sides are surrounded by fences. How many meters of fences are needed?
一块长方形菜地长35米，宽10米．它的一条短边靠墙，其他三边围上篱笆，需要围多少米的篱笆？
<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<gadget id="calculator">10 + 70</gadget>
<output>80</output>

<result>80</result>