1000 kilobytes are in a megabyte and 1000 megabytes are in a gigabyte. These are the storage industry standards.However, megabytes as displayed by an operating system are actually measured in binary...
368000MB is 359.375GB, as 1GB is 1024MB.
There are 1024 megabytes in a gigabyte, or about 1000 MB. Therefore, 13000 MB = 12.6953125 GB, or about 13 GB.
199.719MB is 0.195GB (1GB=1024MB)