Alright, let's work through 42478561 times 89585091 step by step
42478561 × 89585091 = 89585091 × (42478561)
+ 89585091 × 1 what gives us 89585091
+ 89585091 × 60 that is equal 5375105460
+ 89585091 × 500 what gives us 44792545500
+ 89585091 × 8000 yielding 716680728000
+ 89585091 × 70000 which equals 6270956370000
+ 89585091 × 400000 producing 35834036400000
+ 89585091 × 2000000 giving us 179170182000000
+ 89585091 × 40000000 what gives us 3583403640000000

= 3805445752734051
