The base of a parallelogram is 9.5 cm and the height is 4 cm. What is the area of the triangle with the same base and height?
一个平行四边形的底是9.5cm，高是4cm，与它等底等高的三角形的面积是多少．
<gadget id="calculator">9.5 * 4</gadget>
<output>38</output>

<gadget id="calculator">38 / 2</gadget>
<output>19</output>

<result>19</result>