Cut out the largest triangle on a rectangular paper with a length of 10cm and a width of 6cm. What is the area of the remaining part in cm**2.
在一个长10cm，宽6cm的长方形纸上剪下一个最大的三角形，剩下部分的面积是多少cm**2．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<result>30</result>