The hour hand of a table clock is 6 cm long. From 12 o'clock to 6 o'clock, what is the area swept by the hour hand in square centimeters?
台钟的时针长6厘米，从12时到6时，时针扫过的面积是多少平方厘米．
<gadget id="calculator">113.04 / 2</gadget>
<output>56.52</output>

<result>56.52</result>