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## kilobytes – Kilobytes

Write a program that computes how many bytes are there in given numbers of
kilobytes (KB),
megabytes (MB),
gigabytes (GB),
kibibytes (KiB),
mebibytes (MiB) and
gibibytes (GiB).
Use the decimal scale (1000) for the kilo, mega and giga prefixes
and the binary scale (1024) for the kibi, mebi and gibi prefixes.

### Input and output

For each line of input there should be a number *n* and a unit *u*
being either `KB`

, `MB`

, `GB`

, `KiB`

, `MiB`

or `GiB`

.

For each line of input there should be a line of output
indicating how many bytes correspond to what was given on the input.

Input is given so that the resulting value *n'* is in the range *0 ≤ n' ≤ 1 073 741 824*.

#### Example input

```
2 KB
2 KiB
12 MB
1 GiB
```

#### Example output

```
2000 bytes
2048 bytes
12000000 bytes
1073741824 bytes
```

### Scoring

- 1/6: works for the above examples but produces output in an incorrect format
- 2/6: works for the above examples and produces output in the correct format
- 6/6: works for other test cases

try first: bytes2bits bits2bytes

try next: bconv

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