If a bicycle factory produces 180 bicycles per day, it takes 10 days to complete. If it produces 20 more bicycles per day than the original plan, how many days can it be completed?
自行车制造厂如果每天生产自行车180辆，10天完成，如果每天比原计划多生产20辆，几天可以完成？
<gadget id="calculator">180 + 20</gadget>
<output>200</output>

<gadget id="calculator">10 / 200</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">180 * (1/20)</gadget>
<output>9</output>

<result>9</result>