The perimeter of a rectangle is 240 meters, and the length is 20 meters more than the width, what is the length in meters?
一个长方形的周长是240米，长比宽多20米，长是多少米？
<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<gadget id="calculator">120 + 20</gadget>
<output>140</output>

<gadget id="calculator">140 / 2</gadget>
<output>70</output>

<result>70</result>