Alright, let's work through 51123444 times 21406076 step by step
51123444 × 21406076 = 21406076 × (51123444)
+ 21406076 × 4 that is equal 85624304
+ 21406076 × 40 yielding 856243040
+ 21406076 × 400 that results in 8562430400
+ 21406076 × 3000 that equals 64218228000
+ 21406076 × 20000 that results in 428121520000
+ 21406076 × 100000 producing 2140607600000
+ 21406076 × 1000000 giving us 21406076000000
+ 21406076 × 50000000 that is equal 1070303800000000

= 1094352327645744
