2. Multiply each bit by its corresponding power of 2 and add all the terms up.
1111 1111 0000 1100 0101 0110(2) =
(1 × 223 + 1 × 222 + 1 × 221 + 1 × 220 + 1 × 219 + 1 × 218 + 1 × 217 + 1 × 216 + 0 × 215 + 0 × 214 + 0 × 213 + 0 × 212 + 1 × 211 + 1 × 210 + 0 × 29 + 0 × 28 + 0 × 27 + 1 × 26 + 0 × 25 + 1 × 24 + 0 × 23 + 1 × 22 + 1 × 21 + 0 × 20)(10) =
(8 388 608 + 4 194 304 + 2 097 152 + 1 048 576 + 524 288 + 262 144 + 131 072 + 65 536 + 0 + 0 + 0 + 0 + 2 048 + 1 024 + 0 + 0 + 0 + 64 + 0 + 16 + 0 + 4 + 2 + 0)(10) =
(8 388 608 + 4 194 304 + 2 097 152 + 1 048 576 + 524 288 + 262 144 + 131 072 + 65 536 + 2 048 + 1 024 + 64 + 16 + 4 + 2)(10) =
16 714 838(10)
The number 1111 1111 0000 1100 0101 0110(2) converted from an unsigned binary (in base 2) and written as a positive integer (with no sign) in decimal system (in base ten):
1111 1111 0000 1100 0101 0110(2) = 16 714 838(10)
Spaces were used to group digits: for binary, by 4, for decimal, by 3.