Alright, let's work through 20104192 times 32192756 step by step
20104192 × 32192756 = 32192756 × (20104192)
+ 32192756 × 2 that is equal 64385512
+ 32192756 × 90 resulting in 2897348040
+ 32192756 × 100 which equals 3219275600
+ 32192756 × 4000 that equals 128771024000
+ 32192756 × 00000 resulting in 0
+ 32192756 × 100000 resulting in 3219275600000
+ 32192756 × 0000000 that equals 0
+ 32192756 × 20000000 producing 643855120000000

= 647209347633152
