How do you convert kg-f into kg?

Multiply by 1000000. So 8 * 1000000 = 8000000 miligrams.

Multiply kg by 2.205 to get pounds. So, 1.44 x 2.205 = 3.1751 pounds.

45.3kg.

Easy. Just divide pounds by 2.2 to get kilograms. (If you need to be more precise in your calculation use 2.20462262 pounds instead of 2.2 pounds.

Simple - divide by 1000. That is, put the decimal point after the 4. There are 1000g in 1kg, so to convert grams to kilograms you always just divide by 1000.