Let's calculate 8457 x 9942
8457 × 9942 = 9942 × (8457)
+ 9942 × 7 that is equal 69594
+ 9942 × 50 resulting in 497100
+ 9942 × 400 resulting in 3976800
+ 9942 × 8000 which equals 79536000

= 84079494
