A triangular lawn has a base of 10 meters and a height of 8 meters. What is the area of the lawn in square meters?
一块三角形的草坪，底是10米，高是8米．这块草坪的面积是多少平方米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<result>40</result>