No problem, we've got 3861972 and 40320387 to multiply
3861972 × 40320387 = 40320387 × (3861972)
+ 40320387 × 2 that results in 80640774
+ 40320387 × 70 what gives us 2822427090
+ 40320387 × 900 which equals 36288348300
+ 40320387 × 1000 producing 40320387000
+ 40320387 × 60000 giving us 2419223220000
+ 40320387 × 800000 giving us 32256309600000
+ 40320387 × 3000000 yielding 120961161000000

= 155716205623164
