Cut out the largest square from a piece of rectangular paper with a length of 10 cm and a width of 6 cm. What is the area of the remaining part?
从一张长10厘米，宽6厘米的长方形纸上剪下一个最大的正方形，剩下的部分面积是多少．
<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<result>24</result>