8 trucks transport 8 trips of coal, transporting a total of 384 tons. There are 600 tons of coal, and it is required to finish transporting 5 trips. How many more trucks should be added?
8辆卡车运8趟煤，共运384吨，现有600吨煤，要求5趟运完，应增加同样的卡车多少辆？
<gadget id="calculator">384 / 8 / 8</gadget>
<output>6</output>

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

<gadget id="calculator">600 / 30</gadget>
<output>20</output>

<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<result>12</result>