If the length of one side of an isosceles right triangle is 2 cm, what is the area of the triangle in square centimetres?
一个等腰直角三角形的一条直角边的长是2cm，这个三角形的面积是多少平方厘米．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<result>2</result>