2. Multiply each bit by its corresponding power of 2 and add all the terms up.
1101 1110 0000 1011 0110 1011 0011 1010 0111 0110 0100 0100 1110(2) =
(1 × 251 + 1 × 250 + 0 × 249 + 1 × 248 + 1 × 247 + 1 × 246 + 1 × 245 + 0 × 244 + 0 × 243 + 0 × 242 + 0 × 241 + 0 × 240 + 1 × 239 + 0 × 238 + 1 × 237 + 1 × 236 + 0 × 235 + 1 × 234 + 1 × 233 + 0 × 232 + 1 × 231 + 0 × 230 + 1 × 229 + 1 × 228 + 0 × 227 + 0 × 226 + 1 × 225 + 1 × 224 + 1 × 223 + 0 × 222 + 1 × 221 + 0 × 220 + 0 × 219 + 1 × 218 + 1 × 217 + 1 × 216 + 0 × 215 + 1 × 214 + 1 × 213 + 0 × 212 + 0 × 211 + 1 × 210 + 0 × 29 + 0 × 28 + 0 × 27 + 1 × 26 + 0 × 25 + 0 × 24 + 1 × 23 + 1 × 22 + 1 × 21 + 0 × 20)(10) =
(2 251 799 813 685 248 + 1 125 899 906 842 624 + 0 + 281 474 976 710 656 + 140 737 488 355 328 + 70 368 744 177 664 + 35 184 372 088 832 + 0 + 0 + 0 + 0 + 0 + 549 755 813 888 + 0 + 137 438 953 472 + 68 719 476 736 + 0 + 17 179 869 184 + 8 589 934 592 + 0 + 2 147 483 648 + 0 + 536 870 912 + 268 435 456 + 0 + 0 + 33 554 432 + 16 777 216 + 8 388 608 + 0 + 2 097 152 + 0 + 0 + 262 144 + 131 072 + 65 536 + 0 + 16 384 + 8 192 + 0 + 0 + 1 024 + 0 + 0 + 0 + 64 + 0 + 0 + 8 + 4 + 2 + 0)(10) =
(2 251 799 813 685 248 + 1 125 899 906 842 624 + 281 474 976 710 656 + 140 737 488 355 328 + 70 368 744 177 664 + 35 184 372 088 832 + 549 755 813 888 + 137 438 953 472 + 68 719 476 736 + 17 179 869 184 + 8 589 934 592 + 2 147 483 648 + 536 870 912 + 268 435 456 + 33 554 432 + 16 777 216 + 8 388 608 + 2 097 152 + 262 144 + 131 072 + 65 536 + 16 384 + 8 192 + 1 024 + 64 + 8 + 4 + 2)(10) =
3 906 250 000 000 078(10)
The number 1101 1110 0000 1011 0110 1011 0011 1010 0111 0110 0100 0100 1110(2) converted from an unsigned binary (in base 2) and written as a positive integer (with no sign) in decimal system (in base ten):
1101 1110 0000 1011 0110 1011 0011 1010 0111 0110 0100 0100 1110(2) = 3 906 250 000 000 078(10)
Spaces were used to group digits: for binary, by 4, for decimal, by 3.