Alright, let's work through 3666 times 1401 step by step
3666 × 1401 = 1401 × (3666)
+ 1401 × 6 that equals 8406
+ 1401 × 60 what gives us 84060
+ 1401 × 600 that equals 840600
+ 1401 × 3000 that results in 4203000

= 5136066
