Alright, let's work through 51337460 times 81310428 step by step
51337460 × 81310428 = 81310428 × (51337460)
+ 81310428 × 0 producing 0
+ 81310428 × 60 resulting in 4878625680
+ 81310428 × 400 that is equal 32524171200
+ 81310428 × 7000 that is equal 569172996000
+ 81310428 × 30000 what gives us 2439312840000
+ 81310428 × 300000 producing 24393128400000
+ 81310428 × 1000000 yielding 81310428000000
+ 81310428 × 50000000 what gives us 4065521400000000

= 4174270845032880
