car needs to transport 120 tons of goods, and 6 cars have been transported, and each car transports 15 tons. How many cars are left?
一辆汽车要运120吨货物，已经运了6车，每车运15吨，剩下的还要运几车？
<gadget id="calculator">30 / 5</gadget>
<output>6</output>

<result>6</result>