Alright, let's work through 64252490 times 41987839 step by step
64252490 × 41987839 = 41987839 × (64252490)
+ 41987839 × 0 yielding 0
+ 41987839 × 90 that is equal 3778905510
+ 41987839 × 400 resulting in 16795135600
+ 41987839 × 2000 that is equal 83975678000
+ 41987839 × 50000 which equals 2099391950000
+ 41987839 × 200000 what gives us 8397567800000
+ 41987839 × 4000000 that results in 167951356000000
+ 41987839 × 60000000 what gives us 2519270340000000

= 2697823205469110
