The base is 8.6m, the height is 2.7m, find the area of the triangle.
底是8.6m，高是2.7m，求三角形的面积．
<gadget id="calculator">2.7 / 2</gadget>
<output>1.35</output>

<gadget id="calculator">8.6 * 1.35</gadget>
<output>11.61</output>

<result>11.61</result>