Alright, let's work through 3531 times 355 step by step
3531 × 355 = 355 × (3531)
+ 355 × 1 what gives us 355
+ 355 × 30 yielding 10650
+ 355 × 500 which equals 177500
+ 355 × 3000 yielding 1065000

= 1253505
