Alright, let's work through 64485309 times 1139301 step by step
64485309 × 1139301 = 1139301 × (64485309)
+ 1139301 × 9 resulting in 10253709
+ 1139301 × 00 resulting in 0
+ 1139301 × 300 resulting in 341790300
+ 1139301 × 5000 which equals 5696505000
+ 1139301 × 80000 that results in 91144080000
+ 1139301 × 400000 that results in 455720400000
+ 1139301 × 4000000 producing 4557204000000
+ 1139301 × 60000000 producing 68358060000000

= 73468177029009
