A big clock, the minute hand is 6 decimeters long, how many square decimeters does the minute hand sweep from 8 o'clock to 9 o'clock?
一座大钟，分针长6分米，从8时到9时，分针扫过的面积是多少平方分米？
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

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

<result>113.04</result>