Alright, let's work through 3673 times 8142 step by step
3673 × 8142 = 8142 × (3673)
+ 8142 × 3 that results in 24426
+ 8142 × 70 what gives us 569940
+ 8142 × 600 what gives us 4885200
+ 8142 × 3000 what gives us 24426000

= 29905566
