Alright, let's work through 42255480 times 15003839 step by step
42255480 × 15003839 = 15003839 × (42255480)
+ 15003839 × 0 yielding 0
+ 15003839 × 80 which equals 1200307120
+ 15003839 × 400 yielding 6001535600
+ 15003839 × 5000 what gives us 75019195000
+ 15003839 × 50000 that is equal 750191950000
+ 15003839 × 200000 that results in 3000767800000
+ 15003839 × 2000000 which equals 30007678000000
+ 15003839 × 40000000 producing 600153560000000

= 633994418787720
