A scribe, who copies a material, copies 36 pages a day, and can finish it in 5 days. If he copies 45 pages a day, how many days can he finish it? (Solve with ratio)
一个抄写员，抄写一份材料，每天抄写36页，5天可以抄完，如果每天抄写45页，只要几天就可以抄完？(用比例解)
<gadget id="calculator">36 * 5</gadget>
<output>180</output>

<gadget id="calculator">180 / 45</gadget>
<output>4</output>

<result>4</result>