A rice milling machine works 4 hours in the morning and 2.5 hours in the afternoon, 1.2 tons more rice in the afternoon than in the morning. How many tons of rice does this rice milling machine produce per hour? (solution by equation)
一台打米机上午工作4小时，下午工作2.5小时，下午比上午多打米1.2吨．这台打米机每小时打米多少吨？(用方程解)
<gadget id="calculator">4 - 2.5</gadget>
<output>1.5</output>

<gadget id="calculator">1.2 / 1.5</gadget>
<output>0.8</output>

<result>0.8</result>