Alright, let's work through 64387324 times 55391610 step by step
64387324 × 55391610 = 55391610 × (64387324)
+ 55391610 × 4 yielding 221566440
+ 55391610 × 20 that results in 1107832200
+ 55391610 × 300 which equals 16617483000
+ 55391610 × 7000 producing 387741270000
+ 55391610 × 80000 what gives us 4431328800000
+ 55391610 × 300000 producing 16617483000000
+ 55391610 × 4000000 what gives us 221566440000000
+ 55391610 × 60000000 resulting in 3323496600000000

= 3566517539951640
