Alright, let's work through 7991 times 2737 step by step
7991 × 2737 = 2737 × (7991)
+ 2737 × 1 that results in 2737
+ 2737 × 90 that results in 246330
+ 2737 × 900 that results in 2463300
+ 2737 × 7000 producing 19159000

= 21871367
