Alright, let's work through 2631 times 661 step by step
2631 × 661 = 661 × (2631)
+ 661 × 1 that equals 661
+ 661 × 30 producing 19830
+ 661 × 600 what gives us 396600
+ 661 × 2000 giving us 1322000

= 1739091
