Alright, let's work through 51382435 times 36685942 step by step
51382435 × 36685942 = 36685942 × (51382435)
+ 36685942 × 5 which equals 183429710
+ 36685942 × 30 yielding 1100578260
+ 36685942 × 400 which equals 14674376800
+ 36685942 × 2000 that equals 73371884000
+ 36685942 × 80000 producing 2934875360000
+ 36685942 × 300000 which equals 11005782600000
+ 36685942 × 1000000 that results in 36685942000000
+ 36685942 × 50000000 that results in 1834297100000000

= 1885013030228770
