Alright, let's work through 12771616 times 15355442 step by step
12771616 × 15355442 = 15355442 × (12771616)
+ 15355442 × 6 yielding 92132652
+ 15355442 × 10 yielding 153554420
+ 15355442 × 600 giving us 9213265200
+ 15355442 × 1000 that equals 15355442000
+ 15355442 × 70000 resulting in 1074880940000
+ 15355442 × 700000 what gives us 10748809400000
+ 15355442 × 2000000 that equals 30710884000000
+ 15355442 × 10000000 yielding 153554420000000

= 196113808734272
