Alright, let's work through 5181 times 7771 step by step
5181 × 7771 = 7771 × (5181)
+ 7771 × 1 which equals 7771
+ 7771 × 80 that is equal 621680
+ 7771 × 100 giving us 777100
+ 7771 × 5000 yielding 38855000

= 40261551
