Question 1203714
.


In the post by  @MathLover1,  calculations are incorrect,


while the logic and the reasoning both are orthogonal to common sense.



Everything in this problem is  SO  CLEAR,  that I will not go deeper inside.

Everything is of the complexity level 3-2 = 1.



My advise to the future readers of her post is do not take it seriously.



Cover your eyes with duct tape and plug your ears with cotton so you don't see or hear it,

for the safety of your mind.