What is the area of an isosceles triangle with a side whose length is 8?
一个等腰三角形，它的一条直角边长是8，它的面积是多少．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<result>32</result>