A pile of goods totals 7.2 tons. A car has been transported 3 times, and there is 1.5 tons left to be transported. How many tons does this car transport on average each time?
一堆货物共7.2吨，一辆汽车已经运了3次，还剩1.5吨没运，这辆汽车平均每次运多少吨？
<gadget id="calculator">7.2 - 1.5</gadget>
<output>5.7</output>

<gadget id="calculator">5.7 / 3</gadget>
<output>1.9</output>

<result>1.9</result>