Cut a largest square from a rectangular piece of paper with a length of 18 cm and a width of 12 cm. What is the area of the cut paper in square centimeters?
在一张长18厘米，宽12厘米的长方形纸片上剪一个最大的正方形，剪去的纸片面积是多少平方厘米．
<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<result>72</result>