Alright, let's work through 66796474 times 61081081 step by step
66796474 × 61081081 = 61081081 × (66796474)
+ 61081081 × 4 what gives us 244324324
+ 61081081 × 70 yielding 4275675670
+ 61081081 × 400 what gives us 24432432400
+ 61081081 × 6000 what gives us 366486486000
+ 61081081 × 90000 yielding 5497297290000
+ 61081081 × 700000 which equals 42756756700000
+ 61081081 × 6000000 that is equal 366486486000000
+ 61081081 × 60000000 producing 3664864860000000

= 4080000838908394
