A typist typed a manuscript at 3.6 thousand words per hour and finished it in 5 hours. If he typed 4.5 thousand words per hour, how many hours would he be able to finish the manuscript?
打字员打一部书稿，每小时打3.6千字，5小时完成，如果每小时打4.5千字，几小时能打完这部书稿？
<gadget id="calculator">5 / 4.5</gadget>
<output>1.111111</output>

<gadget id="calculator">3.6 * 1.111111</gadget>
<output>4</output>

<result>4</result>