The calc command may be used to do simple integer calculations or to convert
numbers from one radix to another. Calc reads commands from stdin and prints
the result to stdout. The inpout radix for mumbers may be decimal (default),
octal (if starting with a '0') or hexadecimal (if starting with "0x"). The
output is always printed in four radices: decimal, octal, hexadecimal, and
binary. The decimal variant is printed in both signed and unsigned
representation. The result is printed in two variants using 32 bit and 64 bit
repesentations for the numbers.
