Mr. Wang downloaded a file on the computer, and 64% of it has been completed. The computer shows that it has taken 16 minutes to download this file. At this speed, how many minutes will Mr. Wang have to wait to finish downloading this file.
王老师在电脑上下载一份文件，已完成了64%，电脑显示下载这份文件已经用了16分钟，照这样的速度，王老师还要等多少分钟才能下载完这份文件．
<gadget id="calculator">64 / 100</gadget>
<output>16/25 = around 0.64</output>

<gadget id="calculator">16 / (16/25)</gadget>
<output>25</output>

<gadget id="calculator">25 - 16</gadget>
<output>9</output>

<result>9</result>