Alright, let's work through 80025164 times 86809749 step by step
80025164 × 86809749 = 86809749 × (80025164)
+ 86809749 × 4 that results in 347238996
+ 86809749 × 60 that is equal 5208584940
+ 86809749 × 100 producing 8680974900
+ 86809749 × 5000 yielding 434048745000
+ 86809749 × 20000 which equals 1736194980000
+ 86809749 × 000000 producing 0
+ 86809749 × 0000000 that is equal 0
+ 86809749 × 80000000 which equals 6944779920000000

= 6946964400523836
