Alright, let's work through 42631055 times 81574802 step by step
42631055 × 81574802 = 81574802 × (42631055)
+ 81574802 × 5 what gives us 407874010
+ 81574802 × 50 yielding 4078740100
+ 81574802 × 000 yielding 0
+ 81574802 × 1000 what gives us 81574802000
+ 81574802 × 30000 what gives us 2447244060000
+ 81574802 × 600000 resulting in 48944881200000
+ 81574802 × 2000000 which equals 163149604000000
+ 81574802 × 40000000 giving us 3262992080000000

= 3477619870676110
