Cut out the largest square from a rectangular piece of paper with a length of 35 cm and a width of 15 cm. What is the area of this square in square centimeters?
在一个长35厘米，宽15厘米的长方形纸片上剪下一个最大的正方形，这个正方形的面积是多少平方厘米．
<gadget id="calculator">15 * 15</gadget>
<output>225</output>

<result>225</result>