The length of a side of an isosceles right triangle is 6 cm, what is its area?
一个等腰直角三角形的直角边长是6厘米，它的面积是多少．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

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

<result>18</result>