The length of the second hand of a wall clock is 4 cm. If the second hand rotates for 5 minutes, how many centimeters does the tip travel?
一座挂钟，秒针长4厘米，这根秒针转动5分钟，针尖共走多少厘米．
<gadget id="calculator">2 * 3.14 * 4</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 * 5</gadget>
<output>125.6</output>

<result>125.6</result>