Alright, let's work through 3155 times 1377 step by step
3155 × 1377 = 1377 × (3155)
+ 1377 × 5 yielding 6885
+ 1377 × 50 what gives us 68850
+ 1377 × 100 which equals 137700
+ 1377 × 3000 which equals 4131000

= 4344435
