Alright, let's work through 79789090 times 52531380 step by step
79789090 × 52531380 = 52531380 × (79789090)
+ 52531380 × 0 that results in 0
+ 52531380 × 90 that equals 4727824200
+ 52531380 × 000 that results in 0
+ 52531380 × 9000 giving us 472782420000
+ 52531380 × 80000 producing 4202510400000
+ 52531380 × 700000 which equals 36771966000000
+ 52531380 × 9000000 which equals 472782420000000
+ 52531380 × 70000000 producing 3677196600000000

= 4191431006644200
