Alright, let's work through 77746121 times 66126718 step by step
77746121 × 66126718 = 66126718 × (77746121)
+ 66126718 × 1 that results in 66126718
+ 66126718 × 20 producing 1322534360
+ 66126718 × 100 resulting in 6612671800
+ 66126718 × 6000 giving us 396760308000
+ 66126718 × 40000 that results in 2645068720000
+ 66126718 × 700000 that equals 46288702600000
+ 66126718 × 7000000 that results in 462887026000000
+ 66126718 × 70000000 that equals 4628870260000000

= 5141095818960878
