Cut off the largest circle from a rectangular iron sheet with a length of 15dm and a width of 12dm. What is the area of the iron sheet left after cutting it off?
从一张长15dm，宽12dm的长方形铁皮上，剪去一个最大的圆，剪去后剩下铁皮的面积是多少？
<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36</gadget>
<output>113.04</output>

<gadget id="calculator">180 - 113.04</gadget>
<output>66.96</output>

<result>66.96</result>