Pounds to kilograms and vice-versa

I was translating one language file from the English language into the Lithuanian language and found one number: 150lbs. lbs stands for pounds. Then I googled a little bit and I found out, that 1 pound is equal to 0.45359237 kilograms. Now I needed to find a way, how to easily convert pounds into the kilograms. Google also confirmed, that it's possible to do like that: weight_in_pounds / 2.2 = weight_in_kilograms and weight_in_kilograms * 2.2 = weight_in_pounds :)