An isosceles right triangle, one side is 3.5 decimeters long, what is the area of the triangle?
一个等腰直角三角形，一条腰长3.5分米，这个三角形的面积是多少平方分米．
<gadget id="calculator">3.5 / 2</gadget>
<output>1.75</output>

<gadget id="calculator">3.5 * 1.75</gadget>
<output>6.125</output>

<result>6.125</result>