The base of a parallelogram is 4.2cm, the height is 3cm, what is the area of the triangle with the same base and height in cm**2.
一个平行四边形底是4.2cm，高是3cm，与它等底等高的三角形的面积是多少cm**2．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">4.2 * (3/2)</gadget>
<output>6.3</output>

<result>6.3</result>