The perimeter of a parallelogram vegetable field is 200 meters. If one side is 60 meters long, what is the length of the side connected to it?
一个平行四边形菜地的周长是200米，如果一条边长是60米，那与其相连的那一条边长是多少米？
<gadget id="calculator">200 / 2</gadget>
<output>100</output>

<gadget id="calculator">100 - 60</gadget>
<output>40</output>

<result>40</result>