First. Two stores in B sell TV sets. Store A sold a total of 980 sets in May, which is 1/6 more than store B. How many sets did store B sell in May? (It is recommended to use the return trip solution)
甲．乙两个商店出售电视机，五月份甲店共售出980台，比乙店多售出(1/6)，乙店五月份售出多少台？(建议用返程解)
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 + (1/6)</gadget>
<output>7/6 = around 1.166667</output>

<gadget id="calculator">980 / (7/6)</gadget>
<output>840</output>

<result>840</result>