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Convert numbers to different bases

To enter a number in binary, preface with '0b', eg: 0b10101

To enter a number in octal, preface with '0o', eg: 0o51

To enter a number in hexadecimal, preface with '0x', eg: 0x1FF

Radix can be any number between 2 and 36 or the name for that base system.