A triangular vegetable field has a base of 2.5 meters and a height of 3.6 meters. What is the area of this vegetable field in square meters?
一块三角形菜地，底是2.5米，高是3.6米，这块菜地的面积是多少平方米？
<gadget id="calculator">3.6 / 2</gadget>
<output>1.8</output>

<gadget id="calculator">2.5 * 1.8</gadget>
<output>4.5</output>

<result>4.5</result>