The length of a side of an isosceles right triangle is 2 cm, what is the area of the triangle?
一个等腰直角三角形的直角边长2cm，这个三角形的面积是多少．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">2 * 1</gadget>
<output>2</output>

<result>2</result>