If a project needs 20 days to be completed by 34 people, if it is to be completed 3 days ahead of schedule, how many more workers are needed now?
一件工程，如果34人工作需20天完成，若要提前3天完工，现在需要增加几名工人？
<gadget id="calculator">20 - 3</gadget>
<output>17</output>

<gadget id="calculator">1 / 17</gadget>
<output>1/17 = around 0.058824</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) / 34</gadget>
<output>1/680 = around 0.001471</output>

<gadget id="calculator">(1/17) / (1/680)</gadget>
<output>40</output>

<gadget id="calculator">40 - 34</gadget>
<output>6</output>

<result>6</result>