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

You have 98 tonnes of iron ore252sulphur but you need to know how many kilogrammes that is. To get the answer multiply by 1000 which gives you 98000 kilogrammes.

How many kilogrammes of lead are there in 6 tonnes? Just multiply by 1000 to get the answer of 6000 kilogrammes.

In 94 tonnes of tin there are 94000 kilogrammes, to achieve this take 94 and just multiply by 1000.