An article has a total of 3,000 words. Chen Ming typed 120 words per minute. He has typed for 23 minutes. How many words are left?
一篇文章共3000字，陈明每分钟打120个字，已经打了23分钟，还剩多少个字没打？
<gadget id="calculator">120 * 23</gadget>
<output>2_760</output>

<gadget id="calculator">3_000 - 2_760</gadget>
<output>240</output>

<result>240</result>