Alright, let's work through 42453723 times 53701247 step by step
42453723 × 53701247 = 53701247 × (42453723)
+ 53701247 × 3 what gives us 161103741
+ 53701247 × 20 yielding 1074024940
+ 53701247 × 700 that results in 37590872900
+ 53701247 × 3000 resulting in 161103741000
+ 53701247 × 50000 what gives us 2685062350000
+ 53701247 × 400000 that results in 21480498800000
+ 53701247 × 2000000 which equals 107402494000000
+ 53701247 × 40000000 that results in 2148049880000000

= 2279817864892581
