The fertilizer factory plans to produce a batch of fertilizers. On the first day, it produced (1/6) of all the tasks, on the second day it produced the remaining tasks (1/4), and on the third day it produced the rest of the tasks after the first two days. (1/5), the result is that there are still 50 tons left unfinished. Ask how many tons of fertilizer the fertilizer factory plans to produce?
化肥厂计划生产一批化肥，第一天生产了全部任务的(1/6)，第二天又生产了余下任务的(1/4)，第三天又生产了前两天生产后余下的(1/5)，结果还剩下50吨没有完成．问化肥厂计划生产化肥多少吨？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">50 / (4/5) / (3/4) / (5/6)</gadget>
<output>100</output>

<result>100</result>