There is a batch of 14.6 tons of goods, part of which has been shipped away, and the remaining 7.8 tons have not been shipped. How many tons have been shipped?
有一批货物14.6吨，运走一部分，还剩下7.8吨没有运，已运了多少吨？
<gadget id="calculator">14.6 - 7.8</gadget>
<output>6.8</output>

<result>6.8</result>