Alright, let's work through 64178399 times 34737160 step by step
64178399 × 34737160 = 34737160 × (64178399)
+ 34737160 × 9 that results in 312634440
+ 34737160 × 90 which equals 3126344400
+ 34737160 × 300 that is equal 10421148000
+ 34737160 × 8000 that is equal 277897280000
+ 34737160 × 70000 what gives us 2431601200000
+ 34737160 × 100000 resulting in 3473716000000
+ 34737160 × 4000000 that equals 138948640000000
+ 34737160 × 60000000 that equals 2084229600000000

= 2229375314606840
