2.21 kilograms = 2,210 grams.
1 kg = 1000 g so 80 kg = 80,000 g. Simple!
There are 5000 g in 5 kg. There are X000 g in X kg
1 kg = 1000 g 8.3 kg = 8300 g
1kg = 1000g Therefore 0.35kg is equal to 350g. This can be found by multiplying 0.35*1000g.