Alright, let's work through 51787967 times 27685735 step by step
51787967 × 27685735 = 27685735 × (51787967)
+ 27685735 × 7 giving us 193800145
+ 27685735 × 60 that results in 1661144100
+ 27685735 × 900 giving us 24917161500
+ 27685735 × 7000 what gives us 193800145000
+ 27685735 × 80000 what gives us 2214858800000
+ 27685735 × 700000 that is equal 19380014500000
+ 27685735 × 1000000 yielding 27685735000000
+ 27685735 × 50000000 that equals 1384286750000000

= 1433787930550745
