Alright, let's work through 65961885 times 66651733 step by step
65961885 × 66651733 = 66651733 × (65961885)
+ 66651733 × 5 that results in 333258665
+ 66651733 × 80 resulting in 5332138640
+ 66651733 × 800 that is equal 53321386400
+ 66651733 × 1000 yielding 66651733000
+ 66651733 × 60000 yielding 3999103980000
+ 66651733 × 900000 which equals 59986559700000
+ 66651733 × 5000000 that equals 333258665000000
+ 66651733 × 60000000 yielding 3999103980000000

= 4396473947196705
