To convert kilos to grammes 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've got 160 kilos of barley but someone only wants to buy that in units of grammes, to change the units multiply by 1000. Now you have 160000 grammes.
How many grammes of onions are there in 70 kilos? Just multiply by 1000 to get the answer of 70000 grammes.
You have 470 kilos of potatoes but you need to know how many grammes that is. To get the answer multiply by 1000 which gives you 470000 grammes.
To convert 170 kilos into grammes multiply by 1000 giving 170000 grammes.