Alright, let's work through 3786 times 4382 step by step
3786 × 4382 = 4382 × (3786)
+ 4382 × 6 which equals 26292
+ 4382 × 80 yielding 350560
+ 4382 × 700 yielding 3067400
+ 4382 × 3000 that equals 13146000

= 16590252
