A batch of goods weighed 9.8 tons. 1.4 tons were transported for the first time, and 2.1 tons were transported for the second time. If the remaining goods have to be transported in 3 times, how many tons are transported on average each time?
一批货物重9.8吨．第一次运走1.4吨，第二次运走2.1吨，如果剩下的货物要分3次运完，平均每次运多少吨？
<gadget id="calculator">9.8 - 1.4 - 2.1</gadget>
<output>6.3</output>

<gadget id="calculator">6.3 / 3</gadget>
<output>2.1</output>

<result>2.1</result>