[x64] Calculator in AMD64 takes wrong numbers because of msvcrt.dll

ROS version tested: reactos-bootcd-0.4.15-dev-2739-gd65d413
Arch: amd64 (msvc dbg)
Type of CD: BootCD
Enviroment: VirtualBox

Steps to reproduce the issue.
1. Install ReactOS 64 in a VBox 64 machine.
2. Start calc.exe and press numbers and after that, the plus sign.

Table with reactions now.

Number clicked	After pressing +
0.1	Breaks the system Calc break 01.txt
1	0.000000000001
2	0.00000000002
3	0.0000000003
4	0.000000004
5	0.00000005
6	0.0000006
7	0.000007
8	,0.00008
9	,,,,0.009
10	,,,,,,0.01
11	,,,,,,,,,0.11
12	,,,,,,,,,,,,1.2
13	,,,,,,,,,,,,,13
...	etc
after 10 digit number f.e. 9*10^9	Breaks the system Calc AMD64.txt

The commas dissapear when you untick group digits. This problem does not reproduce when running our calc.exe in Windows or Wine. As said by Timo in the chat, the math is hacked.

After making calculations, the resultant is the number in the right column.