Find the area of a triangle whose base and height are both 1.4 meters.
一个三角形，底和高都是1.4米，求它的面积．
<gadget id="calculator">1.4 / 2</gadget>
<output>0.7</output>

<gadget id="calculator">1.4 * 0.7</gadget>
<output>0.98</output>

<result>0.98</result>