The hour hand of a clock is 6 cm long. From 0 o'clock to 6 o'clock, what is the area swept by the hour hand in square centimeters?
钟表的时针长6cm，从0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">30 * 6</gadget>
<output>180</output>

<gadget id="calculator">180 / 360</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3.14 * 36 * (1/2)</gadget>
<output>56.52</output>

<result>56.52</result>