Alright, let's work through 88639074 times 39013492 step by step
88639074 × 39013492 = 39013492 × (88639074)
+ 39013492 × 4 that equals 156053968
+ 39013492 × 70 yielding 2730944440
+ 39013492 × 000 resulting in 0
+ 39013492 × 9000 which equals 351121428000
+ 39013492 × 30000 that results in 1170404760000
+ 39013492 × 600000 yielding 23408095200000
+ 39013492 × 8000000 that results in 312107936000000
+ 39013492 × 80000000 resulting in 3121079360000000

= 3458119804386408
