hi iLham_n,
the part number listed for the vbelt on a gas or LP mazda 2.0 and 2.2L engine is: 580024157. (this part number came from a VX series with a mazda FE or F2 engine).
But, you may be better off taking the one you have and going to a parts supplier and matching it up either by number on the belt or by sizing it up to one slightly smaller than the one you took off (if it's worn out).
In some cases some trucks have a high speed pulley on the fan which will change that size of belt due to the different pulley size on the fan being smaller. These are usually rare cases which in some applications the truck may be in an environment that is hotter than usual and the optional high speed pulley fan option might have been installed. This manual for the VX did not show that option but in some models it does. I do not have that part number for that vbelt.