A flour machine needs to process 4.61 tons of wheat. It has been working for 4.5 hours, and it grinds 0.7 tons of flour per hour on average. The rest takes 2 hours to complete. How many tons of flour per hour on average?
一台面粉机要加工小麦4.61吨，已经工作4.5小时，平均每小时磨0.7吨面粉，剩下的要2小时完成，平均每小时磨面多少吨？
<gadget id="calculator">4.5 * 0.7</gadget>
<output>3.15</output>

<gadget id="calculator">4.61 - 3.15</gadget>
<output>1.46</output>

<gadget id="calculator">1.46 / 2</gadget>
<output>0.73</output>

<result>0.73</result>