Ответ:\(12 \cdot 3a = 36a\).\(0.6a \cdot 7b = 4.2ab\).\(0.8m \cdot 0.5m \cdot 4p = 1.6m^2p\).Ответ: 1) \(36a\); 2) \(4.2ab\); 3) \(1.6m^2p\).