Alright, let's work through 78087745 times 87626414 step by step
78087745 × 87626414 = 87626414 × (78087745)
+ 87626414 × 5 giving us 438132070
+ 87626414 × 40 that results in 3505056560
+ 87626414 × 700 that equals 61338489800
+ 87626414 × 7000 yielding 613384898000
+ 87626414 × 80000 that equals 7010113120000
+ 87626414 × 000000 yielding 0
+ 87626414 × 8000000 that results in 701011312000000
+ 87626414 × 70000000 which equals 6133848980000000

= 6842549071696430
