Alright, let's work through 89399137 times 74634338 step by step
89399137 × 74634338 = 74634338 × (89399137)
+ 74634338 × 7 yielding 522440366
+ 74634338 × 30 which equals 2239030140
+ 74634338 × 100 that results in 7463433800
+ 74634338 × 9000 what gives us 671709042000
+ 74634338 × 90000 giving us 6717090420000
+ 74634338 × 300000 producing 22390301400000
+ 74634338 × 9000000 which equals 671709042000000
+ 74634338 × 80000000 that results in 5970747040000000

= 6672245407766306
