parallelogram whose height is 150 cm and whose base is 60 cm is divided into two identical triangles. What is the area of each triangle?
一个高是150厘米，底是60厘米的平行四边形分成两个完全一样的三角形，每个三角形的面积是多少平方厘米．
<gadget id="calculator">60 / 2</gadget>
<output>30</output>

<gadget id="calculator">150 * 30</gadget>
<output>4_500</output>

<result>4_500</result>