square vegetable garden has one side against a wall and is surrounded by a 24-meter-long fence. What is the area of this vegetable field?
一块正方形的菜园，有一面靠墙，用长24米的篱笆围起来，这块菜地的面积是多少？
<gadget id="calculator">24 / 3</gadget>
<output>8</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>