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The decimal equivalent of the octal number (645)8 is ______

The decimal equivalent of the octal number (645)8 is ______ Correct Answer (421)10

Octal to Decimal conversion is obtained by multiplying 8 to the power of base index along with the value at that index position. The decimal equivalent of the octal number (645)8 is 6 * 82 + 4 * 81 + 5 * 80 = 6 * 64 + 4 * 8 + 5 = 384 + 32 + 5 = (421)10.

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