Alright, let's work through 89293481 times 17438902 step by step
89293481 × 17438902 = 17438902 × (89293481)
+ 17438902 × 1 what gives us 17438902
+ 17438902 × 80 that results in 1395112160
+ 17438902 × 400 resulting in 6975560800
+ 17438902 × 3000 that equals 52316706000
+ 17438902 × 90000 yielding 1569501180000
+ 17438902 × 200000 resulting in 3487780400000
+ 17438902 × 9000000 resulting in 156950118000000
+ 17438902 × 80000000 which equals 1395112160000000

= 1557180264397862
