The tortoise and the hare are running a 20,000-meter race. The speed of the hare is five times that of the tortoise. When they start together from the starting point, the tortoise keeps running. The hare goes to a certain place and starts to sleep. When the hare wakes up, the tortoise is already ahead. It is 5670 meters, the rabbit chases after it, but when the tortoise reaches the finish line, the rabbit is still 150 meters behind, so how many meters did the tortoise run while the rabbit was sleeping?
龟兔进行20000米赛跑，兔了的速度是龟的速度的5倍，当它们从起点一起出发后，龟不停地跑，兔子跑到某一地方开始睡觉，兔子醒来时，龟已经领先它5670米，兔子奋起直追，但龟到达终点时，兔子仍落后150米，那么兔子睡觉期间，龟跑了多少米．
<gadget id="calculator">20_000 - 150</gadget>
<output>19_850</output>

<gadget id="calculator">19_850 / 5</gadget>
<output>3_970</output>

<gadget id="calculator">20_000 - 3_970</gadget>
<output>16_030</output>

<result>16_030</result>