Alright, let's work through 40064425 times 79243143 step by step
40064425 × 79243143 = 79243143 × (40064425)
+ 79243143 × 5 yielding 396215715
+ 79243143 × 20 resulting in 1584862860
+ 79243143 × 400 giving us 31697257200
+ 79243143 × 4000 resulting in 316972572000
+ 79243143 × 60000 resulting in 4754588580000
+ 79243143 × 000000 what gives us 0
+ 79243143 × 0000000 giving us 0
+ 79243143 × 40000000 that results in 3169725720000000

= 3174830959487775
