Alright, let's work through 51223870 times 72837178 step by step
51223870 × 72837178 = 72837178 × (51223870)
+ 72837178 × 0 which equals 0
+ 72837178 × 70 yielding 5098602460
+ 72837178 × 800 yielding 58269742400
+ 72837178 × 3000 that results in 218511534000
+ 72837178 × 20000 giving us 1456743560000
+ 72837178 × 200000 that is equal 14567435600000
+ 72837178 × 1000000 resulting in 72837178000000
+ 72837178 × 50000000 that results in 3641858900000000

= 3731002137038860
