You've got 170 kilos of potatoes but someone only wants to buy that in units of lbs, to change the units multiply by 2.204622. Now you have 374.7857 lbs.

How many lbs of rye are there in 950 kilos? Just multiply by 2.204622 to get the answer of 2094.391 lbs.

In 670 kilos of wheat there are 1477.097 lbs, to achieve this take 670 and just multiply by 2.204622.