Wrong V-Speed callouts

hello, Mr. Romanov.
"Linda" reads sometimes the wrong V-Speeds and Flex-Temperature.
I found out that those numbers in the Dataref of the Toliss A321 are with decimal point, means not integer. The MCDU TakeOff-Page rounds those numbers mathematicly. But the copilot-program(in the System-file) reads only the integer of those numbers. In my picture you can see, for example, the V2-speed.
Dataref = 137.877
MCDU  = 138
"Linda" says 137

How can I, via formular, round the dataref-numbers of the read datas.
Or could you change the program lines in the system-file?

In real life the Before Start Checklist is not completed, when the copilot says an different number as in the MCDU is.

Please help!