Starting from the right, and working left - each digit is 8 times the value of the preceding one. So - in this example...
The figure 3 remains the same.
The figure 4 is 8 x 4... 32
The figure 2 is 8 x 8 x 2... 128
So... 3+32+128=163
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221122: Binary = 1000100001000100100010 Octal = 10410442 Decimal = 2232610
The answer depends on what you are converting from: binary, ternary, octal, hexadecimal ...
101102 = 2210 = 1616 = 268
Don't. 889 is not an octal number.
Octal = 52746757 Binary = 101010111100110111101111