and B start from A and B at the same time and walk toward each other. A walks 80 meters per minute, and B walks 60 meters per minute. After starting for a while, the two meet at a distance of 120 meters from the midpoint. If A stops at a certain place on the way after departure, the two will meet at a distance of 120 meters from the midpoint. Question: How many minutes did A stay on the way?
甲、乙二人从A、B两地同时出发，相向而行，甲每分钟走80米，乙每分钟走60米，出发一段时间后，两人在距中点120米处相遇．如果甲出发后在途中某地停留了一会儿，两人还将距中点120米处相遇．问：甲在途中停留了多少分钟？
<gadget id="calculator">80 + 60</gadget>
<output>140</output>

<gadget id="calculator">80 - 60</gadget>
<output>20</output>

<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">120 * (1/10)</gadget>
<output>12</output>

<gadget id="calculator">140 * 12</gadget>
<output>1_680</output>

<gadget id="calculator">1_680 / 2</gadget>
<output>840</output>

<gadget id="calculator">840 + 120</gadget>
<output>960</output>

<gadget id="calculator">960 / 60</gadget>
<output>16</output>

<gadget id="calculator">1_680 - 960</gadget>
<output>720</output>

<gadget id="calculator">720 / 80</gadget>
<output>9</output>

<gadget id="calculator">16 - 9</gadget>
<output>7</output>

<result>7</result>