What is the area of a right triangle, the two sides of which are 80 decimeters and 24 decimeters respectively?
一个直角三角形，两条直角边分别是80分米和24分米，它的面积是多少平方分米．
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">80 * 12</gadget>
<output>960</output>

<result>960</result>