Cut the largest square out of a rectangle with a length of 25 cm and a width of 18 cm, what is the area of the remaining rectangle?
在一张长25厘米，宽18厘米的长方形里剪出一个最大的正方形，求剩下的长方形面积是多少？
<gadget id="calculator">25 - 18</gadget>
<output>7</output>

<gadget id="calculator">7 * 18</gadget>
<output>126</output>

<result>126</result>