If a triangle has a base of 8 cm and a height of 5 cm, what is the area of a parallelogram with the same base and height?
一个三角形底8厘米，高5厘米，与它等底等高的平行四边形的面积是多少．
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">8 * (5/2) * 2</gadget>
<output>40</output>

<result>40</result>