What is the area of a square with a perimeter of 1 meter?
周长为1米的正方形的面积为多少平方厘米．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">1 * 25 * 1 * 25</gadget>
<output>625</output>

<result>625</result>