Alright, let's work through 38440363 times 42511803 step by step
38440363 × 42511803 = 42511803 × (38440363)
+ 42511803 × 3 that is equal 127535409
+ 42511803 × 60 that equals 2550708180
+ 42511803 × 300 that results in 12753540900
+ 42511803 × 0000 giving us 0
+ 42511803 × 40000 yielding 1700472120000
+ 42511803 × 400000 giving us 17004721200000
+ 42511803 × 8000000 that equals 340094424000000
+ 42511803 × 30000000 that is equal 1275354090000000

= 1634169139104489
