Alright, let's work through 67707518 times 78365872 step by step
67707518 × 78365872 = 78365872 × (67707518)
+ 78365872 × 8 that results in 626926976
+ 78365872 × 10 giving us 783658720
+ 78365872 × 500 which equals 39182936000
+ 78365872 × 7000 resulting in 548561104000
+ 78365872 × 00000 what gives us 0
+ 78365872 × 700000 giving us 54856110400000
+ 78365872 × 7000000 yielding 548561104000000
+ 78365872 × 60000000 yielding 4701952320000000

= 5305958689025696
