A rectangular piece of cloth has a circumference of 120 decimeters and a width of 2 meters. What is its length?
一块长方形布周长是120分米，宽2米，它的长是多少米？
<gadget id="calculator">120 / 10</gadget>
<output>12</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<result>4</result>