Cut a square as large as possible from a rectangle with a length of 60 cm and a width of 45 cm. What is the remaining area in square centimeters?
从一个长60厘米，宽45厘米的长方形上剪一下尽可能大的正方形，余下的面积是多少平方厘米？
<gadget id="calculator">60 * 45</gadget>
<output>2_700</output>

<gadget id="calculator">45 * 45</gadget>
<output>2_025</output>

<gadget id="calculator">2_700 - 2_025</gadget>
<output>675</output>

<result>675</result>