If a steel wire 12 cm long is used to form the largest square, what is the area of the square in square centimeters?
用一根长12厘米的钢丝围成一个最大的正方形，这个正方形的面积是多少平方厘米
<gadget id="calculator">12 / 4</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>