Alright, let's work through 64017142 times 20793985 step by step
64017142 × 20793985 = 20793985 × (64017142)
+ 20793985 × 2 producing 41587970
+ 20793985 × 40 resulting in 831759400
+ 20793985 × 100 giving us 2079398500
+ 20793985 × 7000 which equals 145557895000
+ 20793985 × 10000 that is equal 207939850000
+ 20793985 × 000000 that equals 0
+ 20793985 × 4000000 giving us 83175940000000
+ 20793985 × 60000000 that equals 1247639100000000

= 1331171490490870
