The following chart indicates SI prefixes that may be used on a broad range of consumer commodity labels:

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PrefixSymbolMultiplying factor 1
Kilo-kx 103
Deca-da × 10
Deci-d × 10?1
Centi-c × 10?2
Milli-m × 10?3
Micro-µ × 10?6

1 102=100; 103=1000; 10?1=0.1; 10?2=0.01.

Thus, 2 kg=2 × 1000 g=2000 g, and 3 cm=3 × 0.01 m=0.03 m.