Alright, let's work through 42390002 times 65173273 step by step
42390002 × 65173273 = 65173273 × (42390002)
+ 65173273 × 2 resulting in 130346546
+ 65173273 × 00 that is equal 0
+ 65173273 × 000 that results in 0
+ 65173273 × 0000 which equals 0
+ 65173273 × 90000 yielding 5865594570000
+ 65173273 × 300000 that results in 19551981900000
+ 65173273 × 2000000 that equals 130346546000000
+ 65173273 × 40000000 that equals 2606930920000000

= 2762695172816546
