Alright, let's work through 42365255 times 39366434 step by step
42365255 × 39366434 = 39366434 × (42365255)
+ 39366434 × 5 which equals 196832170
+ 39366434 × 50 yielding 1968321700
+ 39366434 × 200 yielding 7873286800
+ 39366434 × 5000 that results in 196832170000
+ 39366434 × 60000 that equals 2361986040000
+ 39366434 × 300000 giving us 11809930200000
+ 39366434 × 2000000 producing 78732868000000
+ 39366434 × 40000000 which equals 1574657360000000

= 1667769014850670
