Alright, let's work through 81191397 times 41574003 step by step
81191397 × 41574003 = 41574003 × (81191397)
+ 41574003 × 7 that results in 291018021
+ 41574003 × 90 that is equal 3741660270
+ 41574003 × 300 producing 12472200900
+ 41574003 × 1000 that results in 41574003000
+ 41574003 × 90000 that equals 3741660270000
+ 41574003 × 100000 that is equal 4157400300000
+ 41574003 × 1000000 producing 41574003000000
+ 41574003 × 80000000 that results in 3325920240000000

= 3375451382452191
