Alright, let's work through 51391605 times 41243833 step by step
51391605 × 41243833 = 41243833 × (51391605)
+ 41243833 × 5 producing 206219165
+ 41243833 × 00 what gives us 0
+ 41243833 × 600 producing 24746299800
+ 41243833 × 1000 giving us 41243833000
+ 41243833 × 90000 that is equal 3711944970000
+ 41243833 × 300000 which equals 12373149900000
+ 41243833 × 1000000 giving us 41243833000000
+ 41243833 × 50000000 resulting in 2062191650000000

= 2119586774221965
