150 tons of coal have to be transported from the coal mine, and each truck is loaded with 5 tons of coal. There are already 16 trucks loaded. How many trucks are needed to complete the task?
从煤矿要运走150吨煤，每辆卡车装5吨煤，已经装有了16辆卡，还要装多少辆车才能完成任务？
<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">30 - 16</gadget>
<output>14</output>

<result>14</result>