A project can be completed by 14 workers in 12 days. If it is to be completed 4 days ahead of schedule, how many more people are needed?
一项工程14个工人12天可以完成，如果要提前4天完成需要增加多少人．
<gadget id="calculator">12 - 4</gadget>
<output>8</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/12) / 14</gadget>
<output>1/168 = around 0.005952</output>

<gadget id="calculator">(1/8) / (1/168)</gadget>
<output>21</output>

<gadget id="calculator">21 - 14</gadget>
<output>7</output>

<result>7</result>