Alright, let's work through 89134815 times 6744759 step by step
89134815 × 6744759 = 6744759 × (89134815)
+ 6744759 × 5 resulting in 33723795
+ 6744759 × 10 resulting in 67447590
+ 6744759 × 800 which equals 5395807200
+ 6744759 × 4000 what gives us 26979036000
+ 6744759 × 30000 resulting in 202342770000
+ 6744759 × 100000 yielding 674475900000
+ 6744759 × 9000000 producing 60702831000000
+ 6744759 × 80000000 that equals 539580720000000

= 601192845684585
