456кг = 456000г; 60% = 0,6; 456000 * 0,6 = 273600г
273600 : 30 = 9120(шт)
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456кг = 456000г; 60% = 0,6; 456000 * 0,6 = 273600г
273600 : 30 = 9120(шт)