To convert tons 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.

In 7 tons of timber there are 7000 kilogrammes, to achieve this take 7 and just multiply by 1000.

To convert 17 tons into kilogrammes multiply by 1000 giving 17000 kilogrammes.

How many kilogrammes of lead are there in 64 tons? Just multiply by 1000 to get the answer of 64000 kilogrammes.

You've got 42 tons of coal but someone only wants to buy that in units of kilogrammes, to change the units multiply by 1000. Now you have 42000 kilogrammes.