[Solved] Convert 1500 Cubic Meters of Gas to Normal Cubic Meters: 170 mbar, 22°C Calculation Method

How to calculate ?.
1500 cubic meters of gas is how many normal meters.
The gas is 170 mbar and 22 degrees C.

http://www.insomnia.pl/%5BF%5D_jednostki_miary-t189999.html
and this at all
http://www.google.pl/#hl=pl&source=hp&biw=167...=g6&aql=&oq=normalny+metr&fp=6f20aa14e5fb5152

Thank you for the answer, but it did not help me.
After the calculations, cosmic numbers come out.
For comparison, I have meter readings.
Such gas consumption occurred for the same production.
Under normal conditions, 1750 m - and in cubic meters, 2600.
But on the second day in normal conditions 2200 m and in cubic meters 3900.
In the first version, the difference is 45-50%
In the second, over 75%
That is why I am asking for a formula, a conversion factor to compare both of these indications.

Take a look at the first link to the post crs_sc .
Note that gas volume depends on temperature and pressure.

Devices with both m3 and Nm3 meters were used