Alright, let's work through 42309800 times 40821646 step by step
42309800 × 40821646 = 40821646 × (42309800)
+ 40821646 × 0 giving us 0
+ 40821646 × 00 giving us 0
+ 40821646 × 800 that is equal 32657316800
+ 40821646 × 9000 yielding 367394814000
+ 40821646 × 00000 yielding 0
+ 40821646 × 300000 giving us 12246493800000
+ 40821646 × 2000000 producing 81643292000000
+ 40821646 × 40000000 that equals 1632865840000000

= 1727155677930800
