Alright, let's work through 72421197 times 75509093 step by step
72421197 × 75509093 = 75509093 × (72421197)
+ 75509093 × 7 that results in 528563651
+ 75509093 × 90 producing 6795818370
+ 75509093 × 100 which equals 7550909300
+ 75509093 × 1000 that is equal 75509093000
+ 75509093 × 20000 yielding 1510181860000
+ 75509093 × 400000 which equals 30203637200000
+ 75509093 × 2000000 producing 151018186000000
+ 75509093 × 70000000 what gives us 5285636510000000

= 5468458899444321
