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2014-09-22T14:52:35+03:00
2014-09-22T14:55:06+03:00
c × 3 = 16
c = 16 :3 = 5 rest 1   = 5,(3)



f : 3 = 20
f = 20 : 3 = 6 rest 2  = 6,(6)