4 + 7 = 11
7 + 4 = 11
7 × 11 = 77
11 × 7 = 77
77 ÷ 11 = 7
77 ÷ 7 = 11
11 × 77 = 847
77 × 11 = 847
11 - 4 = 7
847 ÷ 77 = 11
847 ÷ 11 = 77
11 × 7 × 11 = 847
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