The waist of an isosceles right triangle is 6 decimeters, what is its area in square decimeters?
等腰直角三角形的腰是6分米，它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>