Alright, let's work through 45260662 times 86640390 step by step
45260662 × 86640390 = 86640390 × (45260662)
+ 86640390 × 2 that results in 173280780
+ 86640390 × 60 which equals 5198423400
+ 86640390 × 600 which equals 51984234000
+ 86640390 × 0000 giving us 0
+ 86640390 × 60000 giving us 5198423400000
+ 86640390 × 200000 producing 17328078000000
+ 86640390 × 5000000 giving us 433201950000000
+ 86640390 × 40000000 which equals 3465615600000000

= 3921401407338180
