@ Huapollon
I understand that but i have never made the same mistake so i find it hard to believe.
In my mother tongue, we use number in 1000s.
When I learned English, i was introduced with 100s. 5000 as 50 hundreds.
And when I learn Japanese, i start to revive the way of using 10000s.
However, not a moment would i get mistake in those numbers so i found it weird people got this problem.