To celebrate New Year's Day, the third-grade students stacked 270 flowers in 2 hours, which is the average number of flowers per person per hour.
三年级同学为庆祝元旦，9个人2小时叠花270朵，平均每人每小时叠花多少朵．
<gadget id="calculator">270 / 9 / 2</gadget>
<output>15</output>

<result>15</result>