Alright, let's work through 65817780 times 79149770 step by step
65817780 × 79149770 = 79149770 × (65817780)
+ 79149770 × 0 yielding 0
+ 79149770 × 80 resulting in 6331981600
+ 79149770 × 700 which equals 55404839000
+ 79149770 × 7000 producing 554048390000
+ 79149770 × 10000 resulting in 791497700000
+ 79149770 × 800000 that equals 63319816000000
+ 79149770 × 5000000 resulting in 395748850000000
+ 79149770 × 60000000 yielding 4748986200000000

= 5209462148910600
