A rectangle is 10 meters long and 4 meters wide. A wire is wound around the rectangle twice. How long is the wire?
一个长方形，长是10米，宽4米，一根铁丝围着这个长方形绕2圈，铁丝长多少米？
<gadget id="calculator">10 + 4</gadget>
<output>14</output>

<gadget id="calculator">14 * 2 * 2</gadget>
<output>56</output>

<result>56</result>