Alright, let's work through 80913353 times 75822193 step by step
80913353 × 75822193 = 75822193 × (80913353)
+ 75822193 × 3 giving us 227466579
+ 75822193 × 50 which equals 3791109650
+ 75822193 × 300 that is equal 22746657900
+ 75822193 × 3000 yielding 227466579000
+ 75822193 × 10000 that equals 758221930000
+ 75822193 × 900000 what gives us 68239973700000
+ 75822193 × 0000000 what gives us 0
+ 75822193 × 80000000 producing 6065775440000000

= 6135027867443129
