To convert kilograms to tonnes divide by 1000. I've generated some hopefully helpful examples randomly below, as with most random sentences please excuse the repetitive and occasionally comic outcomes.

In 80 kilograms of sugarbeet there are 0.08 tonnes, to achieve this take 80 and just divide by 1000.

You have 650 kilograms of beetroot but you need to know how many tonnes that is. To get the answer divide by 1000 which gives you 0.65 tonnes.

How many tonnes of onions are there in 100 kilograms? Just divide by 1000 to get the answer of 0.1 tonnes.