Warehouse A has 18 tons of rice, and Warehouse B has 13.5 tons of rice. A car can transport up to 4.5 tons at a time. How many times will it be finished?
甲仓库有大米18吨，乙仓库有大米13.5吨，一辆汽车一次最多能运货4.5吨，几次运完？
<gadget id="calculator">18 + 13.5</gadget>
<output>31.5</output>

<gadget id="calculator">31.5 / 4.5</gadget>
<output>7</output>

<result>7</result>