Cut the largest square out of a rectangular paper with a length of 12 cm and a width of 7 cm. What is the area of the cut square?
在一张长12厘米，宽7厘米的长方形纸中剪下一个最大的正方形，剪下的这个正方形的面积是多少？
<gadget id="calculator">7 * 7</gadget>
<output>49</output>

<result>49</result>