You just have to do some simple math to calculate the answer =P, but because 1 GB = 1000 MB than there are more or less 15000 megabytes in 15 gigabytes
1536 megabytes - There are 1024 megabytes in a gigabyte so 1.5 x 1024 = 1536.
3 megabytes
1 byte = 8 bits So 1M bit is 1/8 M bytes
According to IEEE 1541-2002, lower case b means "bits"; Upper case B means "bytes". There are 8 bits in a byte. Therefore 8 Mb equals 1MB.
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