The base of a triangle is 5 meters and the height is 2.5 meters, what is its area in square meters
一个三角形的底是5米，高是2.5米，它的面积是多少平方米
<gadget id="calculator">2.5 / 2</gadget>
<output>1.25</output>

<gadget id="calculator">5 * 1.25</gadget>
<output>6.25</output>

<result>6.25</result>