A clock, the minute hand is 5 cm long, from 1:00 pm to 6:00 pm, how many centimeters does the tip of the minute hand move.
一块时钟，分针长5厘米，从下午1点到下午6点，分针的针尖走了多少厘米．
<gadget id="calculator">2 * 3.14 * 5 * 5</gadget>
<output>157</output>

<result>157</result>