Alright, let's work through 3905 times 347 step by step
3905 × 347 = 347 × (3905)
+ 347 × 5 yielding 1735
+ 347 × 00 producing 0
+ 347 × 900 what gives us 312300
+ 347 × 3000 which equals 1041000

= 1355035
