You have 670 pounds of butter but you need to know how many kgs that is. To get the answer divide by 2.204622 which gives you 303.9070 kgs.
How many kgs of flour are there in 50 pounds? Just divide by 2.204622 to get the answer of 22.67962 kgs.
To convert 240 pounds into kgs divide by 2.204622 giving 108.8622 kgs.
You've got 390 pounds of pasta but someone only wants to buy that in units of kgs, to change the units divide by 2.204622. Now you have 176.9011 kgs.