Alright, let's work through 78689334 times 99253472 step by step
78689334 × 99253472 = 99253472 × (78689334)
+ 99253472 × 4 what gives us 397013888
+ 99253472 × 30 producing 2977604160
+ 99253472 × 300 that equals 29776041600
+ 99253472 × 9000 yielding 893281248000
+ 99253472 × 80000 which equals 7940277760000
+ 99253472 × 600000 resulting in 59552083200000
+ 99253472 × 8000000 that is equal 794027776000000
+ 99253472 × 70000000 that is equal 6947743040000000

= 7810189608867648
