Use a 48-meter-long fence to form a square vegetable field with one side against the wall. What is the side length of this square vegetable field?
用48米长的篱笆围成一块一面靠墙的正方形菜地，这块正方形菜地的边长是多少？
<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<result>16</result>