Alright, let's work through 3670 times 455 step by step
3670 × 455 = 455 × (3670)
+ 455 × 0 that equals 0
+ 455 × 70 producing 31850
+ 455 × 600 that is equal 273000
+ 455 × 3000 yielding 1365000

= 1669850
