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To fit a base 10 into a base 8 number, the resulting number will be "longer". We can use the successive division-remainder method to achieve the conversion. That is, we divide our target number continuously by 8, until we get all the remainders. On each division, we shift 1 position and the value of the resulting remainder increase by 8 position-1... In additional to base 10 system, there are other numeral systems, such as base 60, which was also commonly used by ancient people for date time calculation. In modern time, computers use the binary numeral system for internal calculation. Hexadecimal and octal are the companion for the binary number as they are easy to use.