A triangle has a base length of 40 meters and a height of 18 meters. What is the area of the triangle in square meters?
一个三角形，底长40米，高18米，这个三角形的面积是多少平方米．
<gadget id="calculator">18 / 2</gadget>
<output>9</output>

<gadget id="calculator">40 * 9</gadget>
<output>360</output>

<result>360</result>