Alright, let's work through 98836994 times 42503443 step by step
98836994 × 42503443 = 42503443 × (98836994)
+ 42503443 × 4 resulting in 170013772
+ 42503443 × 90 producing 3825309870
+ 42503443 × 900 resulting in 38253098700
+ 42503443 × 6000 giving us 255020658000
+ 42503443 × 30000 what gives us 1275103290000
+ 42503443 × 800000 which equals 34002754400000
+ 42503443 × 8000000 producing 340027544000000
+ 42503443 × 90000000 what gives us 3825309870000000

= 4200912540770342
