Xiaohong typed a 3,000-word manuscript, 20% of the manuscript was typed in the first hour, and (1/4) of the manuscript was typed in the second hour. How many words are left untyped?
小红打一篇3000字的稿件，第一小时打了这篇稿件的20%，第二小时打了这篇稿件的(1/4)．还剩多少字没打？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/5) - (1/4)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">3_000 * (11/20)</gadget>
<output>1_650</output>

<result>1_650</result>