Alright, let's work through 3921 times 1618 step by step
3921 × 1618 = 1618 × (3921)
+ 1618 × 1 resulting in 1618
+ 1618 × 20 producing 32360
+ 1618 × 900 resulting in 1456200
+ 1618 × 3000 that is equal 4854000

= 6344178
