A square vegetable field, one side is against the wall, and the other three sides are surrounded by bamboo fences. After the fence is completed, the total length of the bamboo fence is measured to be 36 meters. How many square meters is the area of the vegetable field?
一块正方形菜地，一面靠墙，其他三面围竹篱笆，围好后，测出竹篱笆一共长36米，菜地的面积多少平方米？
<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<result>144</result>