Alright, let's work through 2782 times 7731 step by step
2782 × 7731 = 7731 × (2782)
+ 7731 × 2 which equals 15462
+ 7731 × 80 resulting in 618480
+ 7731 × 700 which equals 5411700
+ 7731 × 2000 resulting in 15462000

= 21507642
