If a typist types a manuscript, if he types 18 pages a day, he can finish typing in 15 days. How many pages should be typed every day if it is to be typed in 10 days? (answer with ratio)
一位打字员打一本书稿，如果每天打18页，15天可以打完．若要10天打完，每天应打多少页？(用比例解答)
<gadget id="calculator">18 * 15</gadget>
<output>270</output>

<gadget id="calculator">270 / 10</gadget>
<output>27</output>

<result>27</result>