one cigarette weighs about 1.2 gram.. 20 cigarettes are in each pack.. so that's 30g per pack.. there are 10 packs of cigarettes in a ream.. so 1 ream is about 300g..
1.2g x 20 cig x 10 pk
---- -------- ------- = 300g/ream
1cig 1pk 1 rm
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