tortoise and a hare race on a track with a total length of 1000 meters. The speed of the hare is 15 times that of the tortoise. But the rabbit rested for a while during the race, and when he woke up, he found that the tortoise had just reached the finish line, while the rabbit was still 100 meters away from the finish line. Then how many meters did the tortoise crawl during the rest period of the rabbit?
乌龟和兔子在全长为1000米的赛道上比赛，兔子的速度是乌龟速度的15倍．但兔子在比赛的过程中休息了一会儿，醒来时发现乌龟刚好到达终点，而此时兔子还差100米才到终点．则兔子休息期间乌龟爬行了多少米．
<gadget id="calculator">1_000 - 100</gadget>
<output>900</output>

<gadget id="calculator">900 / 15</gadget>
<output>60</output>

<gadget id="calculator">1_000 - 60</gadget>
<output>940</output>

<result>940</result>