Xiao Ming has to go to the school 1000 meters away from home before 7:30 every morning. One day, Xiao Ming set off at a speed of 80 m/min. Five minutes later, Xiao Ming's father found that he forgot to bring his math books, so his father immediately chased Xiao Ming at a speed of 180 m/min, and caught up with him on the way. How long did it take Dad to catch up with Xiao Ming, and how far away was the school when he caught up.
小明每天早上要在7：30之前赶到距家1000米的学校上学．一天，小明以80米/分的速度出发，5分钟后，小明的爸爸发现他忘了带数学书，于是，爸爸立即以180米/分的速度去追小明，并且在途中追上他，问爸爸追上小明用了多长时间，追上时距学校还有多远．
<gadget id="calculator">80 * 5</gadget>
<output>400</output>

<gadget id="calculator">180 - 80</gadget>
<output>100</output>

<gadget id="calculator">400 / 100</gadget>
<output>4</output>

<gadget id="calculator">180 * 4</gadget>
<output>720</output>

<gadget id="calculator">1_000 - 720</gadget>
<output>280</output>

<result>280</result>