There is a rectangular vegetable field with an area of 490 square meters and a length of 35 meters. Now we need to build a fence around it. How long is the fence?
有一块面积为490平方米的长方形菜地，长35米．现在要在它的周围围一圈篱笆，篱笆长多少米？
<gadget id="calculator">490 / 35</gadget>
<output>14</output>

<gadget id="calculator">35 + 14</gadget>
<output>49</output>

<gadget id="calculator">49 * 2</gadget>
<output>98</output>

<result>98</result>