If the length of the side of an isosceles right triangle is 5.6 decimeters, what is its area in square decimeters?
一个等腰直角三角形的腰长是5.6分米，它的面积是多少平方分米．
<gadget id="calculator">5.6 / 2</gadget>
<output>2.8</output>

<gadget id="calculator">5.6 * 2.8</gadget>
<output>15.68</output>

<result>15.68</result>