If one side of an isosceles right triangle is 3 cm long, what is the area of the isosceles right triangle?
一个等腰直角三角形的一条直角边长为3厘米，则这个等腰直角三角形的面积为多少平方厘米．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 * (3/2)</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>