One tractor can transport 30 boxes of eggplants at a time. There are 7,200 boxes of eggplants in the vegetable market. If 15 tractors are used to transport them, how many times can they be transported?
一台拖拉机一次可以运茄子30箱，菜市场有7200箱茄子，用15辆拖拉机来运，多少次可以运完？
<gadget id="calculator">30 * 15</gadget>
<output>450</output>

<gadget id="calculator">7_200 / 450</gadget>
<output>16</output>

<result>16</result>