Alright, let's work through 66688559 times 61303383 step by step
66688559 × 61303383 = 61303383 × (66688559)
+ 61303383 × 9 that results in 551730447
+ 61303383 × 50 what gives us 3065169150
+ 61303383 × 500 resulting in 30651691500
+ 61303383 × 8000 which equals 490427064000
+ 61303383 × 80000 that results in 4904270640000
+ 61303383 × 600000 giving us 36782029800000
+ 61303383 × 6000000 yielding 367820298000000
+ 61303383 × 60000000 producing 3678202980000000

= 4088234274095097
