When a typist types a manuscript, he has already typed 60% of the whole book, exactly 300,000 words. How many words are left in this manuscript?
打字员打一部书稿，已经打了全书的60%，正好打了30万字．这部书稿还有多少字没打完？
<gadget id="calculator">50 - 30</gadget>
<output>20</output>

<gadget id="calculator">20 * 10_000</gadget>
<output>200_000</output>

<result>200_000</result>