The length of the base of the triangle is 5cm, and the height above the base is 3cm, what is the area of the triangle in cm**2.
三角形的底边长5cm，底边上的高为3cm，则三角形面积是多少cm**2．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 * (3/2)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>