The prefix mega means one million; this prefix means one billion
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peta, P, 10005, 10, 1000000000000000, quadrillion, thousand billion or billiard, 
1975 ... 1 km2 means one square kilometre, or the area of a square of ... 2 Mm3 
means two cubic megametres, or the volume of two... [DOC] [TLE] Prefixes | NIST [PAR] Jan 13, 2010 ...