Alright, let's work through 4077 times 5180 step by step
4077 × 5180 = 5180 × (4077)
+ 5180 × 7 what gives us 36260
+ 5180 × 70 what gives us 362600
+ 5180 × 000 that equals 0
+ 5180 × 4000 that results in 20720000

= 21118860
