Collecting trough WMI from Win32_PerfRawData_PerfDisk_PhysicalDisk Class, cannot understand the Scale

Hey i read from WMI to Get the IOPS for a Disk.

but when i get the info i don't understand how to read it , the Numbers are to big.

For Example this is a sample code:

ManagementScope oMs = new System.Management.ManagementScope("root\\cimv2");
            //Inventory
            ObjectQuery InventQuery = new ObjectQuery("SELECT * FROM Win32_OperatingSystem");
            ManagementObjectSearcher Inventsearcher = new ManagementObjectSearcher(oMs, InventQuery);
            ManagementObjectCollection InventCollection = Inventsearcher.Get();

            foreach (ManagementObject mgt in InventCollection)
            {
                outBox.AppendText(mgt["csname"].ToString() + "\n");
            } 

            //Performance
            ObjectQuery PerfQuery = new ObjectQuery("SELECT * FROM Win32_PerfRawData_PerfDisk_PhysicalDisk");
            ManagementObjectSearcher Perfsearcher = new ManagementObjectSearcher(oMs, PerfQuery);
            ManagementObjectCollection PerfCollection = Perfsearcher.Get();

            foreach (ManagementObject mgt in PerfCollection)
            {
                outBox.AppendText("Write IOps: "+  mgt["DiskWritesPerSec"].ToString() + "\n");
                outBox.AppendText("Read  IOps: " + mgt["DiskReadsPerSec"].ToString() + "\n");
            }

This is the OutPut:

Write IOps: 11994709
Read  IOps: 10541530