Alright, let's work through 89896154 times 96879009 step by step
89896154 × 96879009 = 96879009 × (89896154)
+ 96879009 × 4 what gives us 387516036
+ 96879009 × 50 giving us 4843950450
+ 96879009 × 100 resulting in 9687900900
+ 96879009 × 6000 resulting in 581274054000
+ 96879009 × 90000 resulting in 8719110810000
+ 96879009 × 800000 that is equal 77503207200000
+ 96879009 × 9000000 yielding 871911081000000
+ 96879009 × 80000000 yielding 7750320720000000

= 8709050312431386
