Alright, let's work through 85855599 times 55004561 step by step
85855599 × 55004561 = 55004561 × (85855599)
+ 55004561 × 9 yielding 495041049
+ 55004561 × 90 which equals 4950410490
+ 55004561 × 500 producing 27502280500
+ 55004561 × 5000 that is equal 275022805000
+ 55004561 × 50000 what gives us 2750228050000
+ 55004561 × 800000 that results in 44003648800000
+ 55004561 × 5000000 what gives us 275022805000000
+ 55004561 × 80000000 giving us 4400364880000000

= 4722449532387039
