In a rectangular paper with a length of 40 cm and a width of 15 cm, cut out the 2 largest squares, what is the area of the remaining part in square centimeters?
在一张长40厘米，宽15厘米的长方形纸中，剪去2个最大的正方形，剩余部分的面积是多少平方厘米．
<gadget id="calculator">40 - 15 - 15</gadget>
<output>10</output>

<gadget id="calculator">15 * 10</gadget>
<output>150</output>

<result>150</result>