A plastic factory needs to produce 2.45 tons of plastic film. Has been produced for 5 hours. Produce 0.28 tons per hour. The remaining tasks require 3 hours to complete. How many tons are produced per hour on average?
一个塑料厂要生产塑料薄膜2.45吨．已经生产了5小时．每小时生产0.28吨．其余的任务要求3小时完成．平均每小时要生产多少吨？
<gadget id="calculator">0.28 * 5</gadget>
<output>1.4</output>

<gadget id="calculator">2.45 - 1.4</gadget>
<output>1.05</output>

<gadget id="calculator">1.05 / 3</gadget>
<output>0.35</output>

<result>0.35</result>