Alright, let's work through 42409891 times 43135368 step by step
42409891 × 43135368 = 43135368 × (42409891)
+ 43135368 × 1 yielding 43135368
+ 43135368 × 90 yielding 3882183120
+ 43135368 × 800 producing 34508294400
+ 43135368 × 9000 that equals 388218312000
+ 43135368 × 00000 that is equal 0
+ 43135368 × 400000 what gives us 17254147200000
+ 43135368 × 2000000 giving us 86270736000000
+ 43135368 × 40000000 what gives us 1725414720000000

= 1829366255124888
