There are 15 containers, each weighing 2 tons, and they are transported away by a truck with a load capacity of 5 tons. At least how many trucks are needed?
有15个集装箱，每个重2吨，用载重量是5吨的卡车一次运走，至少需要几辆卡车？
<gadget id="calculator">2 * 15</gadget>
<output>30</output>

<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<result>6</result>