The length of the hour hand of a clock is 6 cm. From 3 o'clock to 6 o'clock, what is the area swept by the hour hand in square centimeters?
某钟表时针的长度为6cm，从3时到6时，时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 / 4</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>