Alright, let's work through 51027741 times 13550939 step by step
51027741 × 13550939 = 13550939 × (51027741)
+ 13550939 × 1 yielding 13550939
+ 13550939 × 40 that results in 542037560
+ 13550939 × 700 that is equal 9485657300
+ 13550939 × 7000 that equals 94856573000
+ 13550939 × 20000 producing 271018780000
+ 13550939 × 000000 what gives us 0
+ 13550939 × 1000000 that is equal 13550939000000
+ 13550939 × 50000000 that results in 677546950000000

= 691473805598799
