How many bytes are there in 5 megabytes?

There are 5,242,880 bytes in 5 megabytes, assuming the definition of a megabyte as 1,024 kilobytes and 1 kilobyte as 1,024 bytes. This is calculated as follows: (5 \text{ MB} \times 1,024 \text{ KB/MB} \times 1,024 \text{ bytes/KB} = 5,242,880 \text{ bytes}).