2. Multiply each bit by its corresponding power of 2 and add all the terms up.
111 1100 0010 1000 0100 1101 1010 1110 1111 0000 1011 1010 0000 0110 1001 0011(2) =
(1 × 262 + 1 × 261 + 1 × 260 + 1 × 259 + 1 × 258 + 0 × 257 + 0 × 256 + 0 × 255 + 0 × 254 + 1 × 253 + 0 × 252 + 1 × 251 + 0 × 250 + 0 × 249 + 0 × 248 + 0 × 247 + 1 × 246 + 0 × 245 + 0 × 244 + 1 × 243 + 1 × 242 + 0 × 241 + 1 × 240 + 1 × 239 + 0 × 238 + 1 × 237 + 0 × 236 + 1 × 235 + 1 × 234 + 1 × 233 + 0 × 232 + 1 × 231 + 1 × 230 + 1 × 229 + 1 × 228 + 0 × 227 + 0 × 226 + 0 × 225 + 0 × 224 + 1 × 223 + 0 × 222 + 1 × 221 + 1 × 220 + 1 × 219 + 0 × 218 + 1 × 217 + 0 × 216 + 0 × 215 + 0 × 214 + 0 × 213 + 0 × 212 + 0 × 211 + 1 × 210 + 1 × 29 + 0 × 28 + 1 × 27 + 0 × 26 + 0 × 25 + 1 × 24 + 0 × 23 + 0 × 22 + 1 × 21 + 1 × 20)(10) =
(4 611 686 018 427 387 904 + 2 305 843 009 213 693 952 + 1 152 921 504 606 846 976 + 576 460 752 303 423 488 + 288 230 376 151 711 744 + 0 + 0 + 0 + 0 + 9 007 199 254 740 992 + 0 + 2 251 799 813 685 248 + 0 + 0 + 0 + 0 + 70 368 744 177 664 + 0 + 0 + 8 796 093 022 208 + 4 398 046 511 104 + 0 + 1 099 511 627 776 + 549 755 813 888 + 0 + 137 438 953 472 + 0 + 34 359 738 368 + 17 179 869 184 + 8 589 934 592 + 0 + 2 147 483 648 + 1 073 741 824 + 536 870 912 + 268 435 456 + 0 + 0 + 0 + 0 + 8 388 608 + 0 + 2 097 152 + 1 048 576 + 524 288 + 0 + 131 072 + 0 + 0 + 0 + 0 + 0 + 0 + 1 024 + 512 + 0 + 128 + 0 + 0 + 16 + 0 + 0 + 2 + 1)(10) =
(4 611 686 018 427 387 904 + 2 305 843 009 213 693 952 + 1 152 921 504 606 846 976 + 576 460 752 303 423 488 + 288 230 376 151 711 744 + 9 007 199 254 740 992 + 2 251 799 813 685 248 + 70 368 744 177 664 + 8 796 093 022 208 + 4 398 046 511 104 + 1 099 511 627 776 + 549 755 813 888 + 137 438 953 472 + 34 359 738 368 + 17 179 869 184 + 8 589 934 592 + 2 147 483 648 + 1 073 741 824 + 536 870 912 + 268 435 456 + 8 388 608 + 2 097 152 + 1 048 576 + 524 288 + 131 072 + 1 024 + 512 + 128 + 16 + 2 + 1)(10) =
8 946 486 073 529 861 779(10)
The number 111 1100 0010 1000 0100 1101 1010 1110 1111 0000 1011 1010 0000 0110 1001 0011(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 0010 1000 0100 1101 1010 1110 1111 0000 1011 1010 0000 0110 1001 0011(2) = 8 946 486 073 529 861 779(10)
Spaces were used to group digits: for binary, by 4, for decimal, by 3.