A project, if 18 people work 8 hours a day, will take 50 days to complete. If the number of people is reduced (1/3) and the daily working hours are extended (1/4), how many days will it be delayed to complete the project?
一项工程，如果18人做，每天工作8小时，需要50天完工．如果人数减少(1/3)，每天的工作时间延长(1/4)，这样要推迟几天才能完工？
<gadget id="calculator">1 / 18 / 8 / 50</gadget>
<output>1/7_200 = around 0.000139</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/7_200) * 18 * (2/3) * 8 * (5/4)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">1 / (1/60)</gadget>
<output>60</output>

<gadget id="calculator">60 - 50</gadget>
<output>10</output>

<result>10</result>