Cut out the largest square from a piece of rectangular paper with a length of 30 cm and a width of 25 cm. What is the area of the remaining part in square centimeters?
在一张长30厘米，宽25厘米的长方形纸上剪去一个最大的正方形，剩余部分的面积是多少平方厘米？
<gadget id="calculator">30 * 25</gadget>
<output>750</output>

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

<gadget id="calculator">750 - 625</gadget>
<output>125</output>

<result>125</result>