Alright, let's work through 89668993 times 56891260 step by step
89668993 × 56891260 = 56891260 × (89668993)
+ 56891260 × 3 resulting in 170673780
+ 56891260 × 90 what gives us 5120213400
+ 56891260 × 900 resulting in 51202134000
+ 56891260 × 8000 yielding 455130080000
+ 56891260 × 60000 that is equal 3413475600000
+ 56891260 × 600000 which equals 34134756000000
+ 56891260 × 9000000 that is equal 512021340000000
+ 56891260 × 80000000 which equals 4551300800000000

= 5101381994701180
