Li Ming collected 42 stamps, and Wang Hong collected more stamps than Li Ming (2/7). How many stamps did Li Ming collect less than Wang Hong?
李明收集邮票42枚，王红收集的邮票比李明多(2/7)．李明比王红少收集邮票多少枚？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">42 * (2/7)</gadget>
<output>12</output>

<result>12</result>