Two people, A and B, assemble bicycles. A assembles 8 bicycles per hour, and B assembles 6 bicycles per hour. Each of them assembles 240 bicycles. How many hours does B take longer than A?
甲、乙两人装配自行车，甲每小时装8辆，乙每小时装6辆，两人各装配240辆．乙比甲要多用多少小时？
<gadget id="calculator">240 / 6</gadget>
<output>40</output>

<gadget id="calculator">240 / 8</gadget>
<output>30</output>

<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<result>10</result>