The perimeter of a rectangle is 72.8 meters, the length is 23.8 meters, and the width is decimeters.
一个长方形的周长是72.8米，长是23.8米，宽是多少分米．
<gadget id="calculator">72.8 / 2</gadget>
<output>36.4</output>

<gadget id="calculator">36.4 - 23.8</gadget>
<output>12.6</output>

<gadget id="calculator">12.6 * 10</gadget>
<output>126</output>

<result>126</result>