1. Map the unsigned binary number's digits versus the corresponding powers of 2 that their place value represent:
214
1 213
0 212
0 211
1 210
0 29
0 28
1 27
0 26
0 25
1 24
0 23
1 22
0 21
0 20
0
2. Multiply each bit by its corresponding power of 2 and add all the terms up:
100 1001 0010 1000(2) =
(1 × 214 + 0 × 213 + 0 × 212 + 1 × 211 + 0 × 210 + 0 × 29 + 1 × 28 + 0 × 27 + 0 × 26 + 1 × 25 + 0 × 24 + 1 × 23 + 0 × 22 + 0 × 21 + 0 × 20)(10) =
(16 384 + 0 + 0 + 2 048 + 0 + 0 + 256 + 0 + 0 + 32 + 0 + 8 + 0 + 0 + 0)(10) =
(16 384 + 2 048 + 256 + 32 + 8)(10) =
18 728(10)
Conclusion: