An isosceles right triangle, one side is 6 decimeters long, what is the area of the triangle in square decimeters?
一个等腰直角三角形，一条腰长6分米，三角形的面积是多少平方分米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">6 * 3</gadget>
<output>18</output>

<result>18</result>