A wire is 180 meters long. Cut it into three sections. The first section is 20 meters longer than the second section, and the third section is twice as long as the first section. What is the length of the second section in meters?
一根电线长180米，将它截成三段，第一段比第二段长20米，第三段长为第一段长的2倍，则第二段的长度为多少米？
<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">180 - 20 - 40</gadget>
<output>120</output>

<gadget id="calculator">1 + 1 + 2</gadget>
<output>4</output>

<gadget id="calculator">120 / 4</gadget>
<output>30</output>

<result>30</result>