The minute hand of a wall clock is 6 cm long. From 10:00 to 10:30, what is the area swept by the minute hand in square centimeters?
一只挂钟的分针长6厘米，从10：00到10：30，分针扫过的面积是多少平方厘米．
<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">3.14 * 18</gadget>
<output>56.52</output>

<result>56.52</result>