The base of the triangle is 8cm, the height is 4cm, what is the area in cm**2.
三角形的底是8cm，高是4cm，面积是多少cm**2．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<result>16</result>