A person went shopping at 6:00 p.m., looked at his watch, and found that the angle between the hour and minute hands was 110**0, and when he returned home before 7:00, he looked at his watch again, and found that the angle between the hour and minute hands was still 110 **0． So how many minutes is this person out?
某人下午六时多外出买东西，出门时看手表，发现表的时针和分针的夹角为110**0，七时前回家时又看手表，发现时针和分针的夹角仍是110**0．那么此人外出多少分钟？
<gadget id="calculator">110 + 110</gadget>
<output>220</output>

<gadget id="calculator">6 - 0.5</gadget>
<output>5.5</output>

<gadget id="calculator">220 / 5.5</gadget>
<output>40</output>

<result>40</result>