Octal to Denary : Sum of Place Values

[B]   Sum of PVs   Chain
This method is best for small numbers.
Write down the steps of your working even if you use a calculator.

Example: Convert the octal number 32047 to denary.

4096 512 64 8 1

3 2 0 4 7

Calculate all the place values.
3x4096 + 2x512 + 0x64 + 4x8 + 7x1

Note: The place value of a 0 digit is 0.

Add all the place values together to give the denary number.
= 12288 + 1024 + 32 + 7
= 13351