Alright, let's work through 2684 times 7811 step by step
2684 × 7811 = 7811 × (2684)
+ 7811 × 4 that is equal 31244
+ 7811 × 80 resulting in 624880
+ 7811 × 600 which equals 4686600
+ 7811 × 2000 that results in 15622000

= 20964724
