In an isosceles triangle with a side length of 4 cm, the ratio of the three interior angles is 1:1:2, what is the area of the triangle in square centimeters?
在一个腰长为4厘米的等腰三角形中，三个内角之比是1：1：2，这个三角形的面积是多少平方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<result>8</result>