Ответ:\(840\,000 : 60 = 14\,000\);\(72\,000 : 300 = 240\);\(420\,000 : 7000 = 60\);\(9600 : 40 = 240\);\(45\,000 : 50 = 900\);\(284\,800 : 80 = 3560\).