Ответ:\(312 \times 3 = 936\);\(284 \times 3 = 852\);\(304 \times 2 = 608\);\(107 \times 4 = 428\);\(148 \times 3 = 444\);\(76 \times 4 = 304\);\(257 \times 2 = 514\);\(344 \times 2 = 688\).