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1.38 kg. How much is it?
2.76 kg.

In the international system of units, kilogram is the basic unit of mass, while kilogram is the traditional unit of mass. The conversion relationship between them is 1kg = 2kg. So 1.38 kg can be converted into kg by simple calculation, that is, 1.38 kg/1 kg *2 kg/1 kg =2.76 kg.

Unit refers to the name of the standard quantity used to measure things in mathematics or physics.