Why do computers use binary?

Only 0 and 12 states, the need to represent 0, 12 states of electronic devices many binary number of the algorithm is less, the operation is simple, the computer operator hardware structure greatly simplified (decimal multiplication 99 Table 55 formula, Binary multiplication has only 4 rules) since the binary 0 and 1 are exactly the same as the false (false) and True (true) of the logical algebra, there is a theoretical basis for logical algebra, and binary representation of binary logic is natural.

Why do computers use binary?