1. The problem involves performing arithmetic calculations based on the given exercises. 2. First, solve the multiplication problems: - $84 \times 6 = 504$ - $19 \times 7 = 133$ 3. Next, solve the division problems: - $195 \div 5 = 39$ - $637 \div 7 = 91$ - $518 \div 7 = 74$ 4. These results come from straightforward multiplication and division. Final answers: 1) $84 \times 6 = 504$ 2) $19 \times 7 = 133$ 1) $195 \div 5 = 39$ 2) $637 \div 7 = 91$ 3) $518 \div 7 = 74$