A harvester harvests 4.5 hectares of wheat in 9 hours, how many hours does it take on average per hectare? How many hectares are usually harvested per hour?
一台收割机9小时收割小麦4.5公顷，平均每公顷要几小时？平时每小时收割几公顷？
<gadget id="calculator">4.5 / 9</gadget>
<output>0.5</output>

<result>0.5</result>