Alright, let's work through 42681663 times 63126644 step by step
42681663 × 63126644 = 63126644 × (42681663)
+ 63126644 × 3 which equals 189379932
+ 63126644 × 60 that equals 3787598640
+ 63126644 × 600 that results in 37875986400
+ 63126644 × 1000 that results in 63126644000
+ 63126644 × 80000 that is equal 5050131520000
+ 63126644 × 600000 resulting in 37875986400000
+ 63126644 × 2000000 resulting in 126253288000000
+ 63126644 × 40000000 that is equal 2525065760000000

= 2694350145528972
