Alright, let's work through 64074295 times 81351816 step by step
64074295 × 81351816 = 81351816 × (64074295)
+ 81351816 × 5 that equals 406759080
+ 81351816 × 90 that equals 7321663440
+ 81351816 × 200 that results in 16270363200
+ 81351816 × 4000 yielding 325407264000
+ 81351816 × 70000 what gives us 5694627120000
+ 81351816 × 000000 that equals 0
+ 81351816 × 4000000 producing 325407264000000
+ 81351816 × 60000000 giving us 4881108960000000

= 5212560257169720
