Alright, let's work through 6401 times 6618 step by step
6401 × 6618 = 6618 × (6401)
+ 6618 × 1 giving us 6618
+ 6618 × 00 giving us 0
+ 6618 × 400 that is equal 2647200
+ 6618 × 6000 that results in 39708000

= 42361818
