Alright, let's work through 79838973 times 47855367 step by step
79838973 × 47855367 = 47855367 × (79838973)
+ 47855367 × 3 what gives us 143566101
+ 47855367 × 70 giving us 3349875690
+ 47855367 × 900 which equals 43069830300
+ 47855367 × 8000 which equals 382842936000
+ 47855367 × 30000 yielding 1435661010000
+ 47855367 × 800000 that results in 38284293600000
+ 47855367 × 9000000 that equals 430698303000000
+ 47855367 × 70000000 yielding 3349875690000000

= 3820723353818091
