Alright, let's work through 51571787 times 76910748 step by step
51571787 × 76910748 = 76910748 × (51571787)
+ 76910748 × 7 giving us 538375236
+ 76910748 × 80 resulting in 6152859840
+ 76910748 × 700 that equals 53837523600
+ 76910748 × 1000 that equals 76910748000
+ 76910748 × 70000 that is equal 5383752360000
+ 76910748 × 500000 what gives us 38455374000000
+ 76910748 × 1000000 yielding 76910748000000
+ 76910748 × 50000000 that equals 3845537400000000

= 3966424713866676
