The perimeter of a square vegetable field is 48 meters, what is the side length in decimeters?
一个正方形菜地的周长是48米，它的边长是多少分米．
<gadget id="calculator">48 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 * 10</gadget>
<output>120</output>

<result>120</result>