2. Multiply each bit by its corresponding power of 2 and add all the terms up.
111 1100 0001 1111 0000 0111 1100 0001 1111 0000 0111 1010 1100(2) =
(1 × 250 + 1 × 249 + 1 × 248 + 1 × 247 + 1 × 246 + 0 × 245 + 0 × 244 + 0 × 243 + 0 × 242 + 0 × 241 + 1 × 240 + 1 × 239 + 1 × 238 + 1 × 237 + 1 × 236 + 0 × 235 + 0 × 234 + 0 × 233 + 0 × 232 + 0 × 231 + 1 × 230 + 1 × 229 + 1 × 228 + 1 × 227 + 1 × 226 + 0 × 225 + 0 × 224 + 0 × 223 + 0 × 222 + 0 × 221 + 1 × 220 + 1 × 219 + 1 × 218 + 1 × 217 + 1 × 216 + 0 × 215 + 0 × 214 + 0 × 213 + 0 × 212 + 0 × 211 + 1 × 210 + 1 × 29 + 1 × 28 + 1 × 27 + 0 × 26 + 1 × 25 + 0 × 24 + 1 × 23 + 1 × 22 + 0 × 21 + 0 × 20)(10) =
(1 125 899 906 842 624 + 562 949 953 421 312 + 281 474 976 710 656 + 140 737 488 355 328 + 70 368 744 177 664 + 0 + 0 + 0 + 0 + 0 + 1 099 511 627 776 + 549 755 813 888 + 274 877 906 944 + 137 438 953 472 + 68 719 476 736 + 0 + 0 + 0 + 0 + 0 + 1 073 741 824 + 536 870 912 + 268 435 456 + 134 217 728 + 67 108 864 + 0 + 0 + 0 + 0 + 0 + 1 048 576 + 524 288 + 262 144 + 131 072 + 65 536 + 0 + 0 + 0 + 0 + 0 + 1 024 + 512 + 256 + 128 + 0 + 32 + 0 + 8 + 4 + 0 + 0)(10) =
(1 125 899 906 842 624 + 562 949 953 421 312 + 281 474 976 710 656 + 140 737 488 355 328 + 70 368 744 177 664 + 1 099 511 627 776 + 549 755 813 888 + 274 877 906 944 + 137 438 953 472 + 68 719 476 736 + 1 073 741 824 + 536 870 912 + 268 435 456 + 134 217 728 + 67 108 864 + 1 048 576 + 524 288 + 262 144 + 131 072 + 65 536 + 1 024 + 512 + 256 + 128 + 32 + 8 + 4)(10) =
2 183 563 455 694 764(10)
The number 111 1100 0001 1111 0000 0111 1100 0001 1111 0000 0111 1010 1100(2) converted from an unsigned binary (in base 2) and written as a positive integer (with no sign) in decimal system (in base ten):
111 1100 0001 1111 0000 0111 1100 0001 1111 0000 0111 1010 1100(2) = 2 183 563 455 694 764(10)
Spaces were used to group digits: for binary, by 4, for decimal, by 3.