Alright, let's work through 55991163 times 43451333 step by step
55991163 × 43451333 = 43451333 × (55991163)
+ 43451333 × 3 what gives us 130353999
+ 43451333 × 60 producing 2607079980
+ 43451333 × 100 what gives us 4345133300
+ 43451333 × 1000 giving us 43451333000
+ 43451333 × 90000 that results in 3910619970000
+ 43451333 × 900000 producing 39106199700000
+ 43451333 × 5000000 that equals 217256665000000
+ 43451333 × 50000000 giving us 2172566650000000

= 2432890668570279
