There is an isosceles triangle with interior angles of 45 degrees and the longest side is 8 cm. What is the area of this triangle in square centimeters?
有一个内角是45度的等腰三角形，最长边为8厘米，这个三角形的面积是多少平方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>