Alright, let's work through 89168515 times 28509745 step by step
89168515 × 28509745 = 28509745 × (89168515)
+ 28509745 × 5 yielding 142548725
+ 28509745 × 10 what gives us 285097450
+ 28509745 × 500 producing 14254872500
+ 28509745 × 8000 yielding 228077960000
+ 28509745 × 60000 that results in 1710584700000
+ 28509745 × 100000 resulting in 2850974500000
+ 28509745 × 9000000 producing 256587705000000
+ 28509745 × 80000000 yielding 2280779600000000

= 2542171624678675
