For a manuscript, Xiao Li planned to enter it into the computer at 5:00, but the actual time spent was 20% less than the original plan. How long did it actually take?
一份稿件，小李计划5时录入电脑，实际所用的时间比原计划节约了20%，实际用了多长时间？
<gadget id="calculator">20 / 100</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">5 * (4/5)</gadget>
<output>4</output>

<result>4</result>