The base of a triangle is 6.5dm long and 1.5dm shorter than the height. What is the area of this triangle in dm**2.
一个三角形的底长6.5dm，比高短1.5dm，这个三角形的面积是多少dm**2．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6.5 + 1.5</gadget>
<output>8</output>

<gadget id="calculator">(1/2) * 6.5 * 8</gadget>
<output>26</output>

<result>26</result>