Alright, let's work through 3783 times 1336 step by step
3783 × 1336 = 1336 × (3783)
+ 1336 × 3 that equals 4008
+ 1336 × 80 that results in 106880
+ 1336 × 700 that is equal 935200
+ 1336 × 3000 what gives us 4008000

= 5054088
