The world premiere of 3,500 Apple mobile phones will be airlifted from mainland China to the United States, which is 1/6 more than the original plan. How many units were originally planned to be shipped?
全球首发苹果手机3500台，从中国大陆空运至美国，比原计划多(1/6)，原计划运多少台？
<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">3_500 / (7/6)</gadget>
<output>3_000</output>

<result>3_000</result>