64% of the file has been downloaded, and there are 9 minutes left. How many minutes will it take to finish downloading this file?
下载一分文件已完成64%，还剩9分钟，想要下载完这文件共要几分钟？
<gadget id="calculator">64 / 100</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">1 - (16/25)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">9 / (9/25)</gadget>
<output>25</output>

<result>25</result>