Convert 11001010(2) to decimal, octal.
| 128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 | | 1 | 1 | 0 | 0 | 1 | 0 | 1 | 0 |
128 + 64 + 8 + 2 = 202(10)
11001010(2) make a set of 3 bits and then find its decimal number.
