Alright, let's work through 7766 times 1631 step by step
7766 × 1631 = 1631 × (7766)
+ 1631 × 6 that is equal 9786
+ 1631 × 60 producing 97860
+ 1631 × 700 that equals 1141700
+ 1631 × 7000 producing 11417000

= 12666346
