Draw the largest triangle in a rectangle with a length of 8 cm and a width of 4 cm. What is the area of this triangle in square centimeters?
在一个长8厘米，宽4厘米的长方形内画一个最大的三角形，这个三角形的面积是多少平方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>