The chemical fertilizer factory produces a batch of chemical fertilizers. It originally planned to produce 50 tons per day, and it took 30 days to complete the production. In fact, it produced 10 tons more per day. How many days to complete the production task?
化肥厂生产一批化肥，原计划每天生产50吨，30天完成，实际每天多生产10吨，多少天完成生产任务？
<gadget id="calculator">50 + 10</gadget>
<output>60</output>

<gadget id="calculator">30 / 60</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">50 * (1/2)</gadget>
<output>25</output>

<result>25</result>