Alright, let's work through 5781 times 2156 step by step
5781 × 2156 = 2156 × (5781)
+ 2156 × 1 that equals 2156
+ 2156 × 80 producing 172480
+ 2156 × 700 that results in 1509200
+ 2156 × 5000 producing 10780000

= 12463836
