The minute hand of the alarm clock is 4 cm long. From 13:15 to 14:00, what is the area covered by the minute hand?
闹钟的分针长4厘米，从13：15分到14：00分，分针走过的范围有多大的面积？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">45 / 60</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 16 * (3/4)</gadget>
<output>37.68</output>

<result>37.68</result>