Alright, let's work through 3666 times 9943 step by step
3666 × 9943 = 9943 × (3666)
+ 9943 × 6 what gives us 59658
+ 9943 × 60 giving us 596580
+ 9943 × 600 giving us 5965800
+ 9943 × 3000 giving us 29829000

= 36451038
