Here’s an entry in the Open 7400 Logic Competition: 2 bits multiplication and division
This Project concerned to the Laboratory of Digital System has the objective to build a prototype which makes simple operations like multiplication and division between two operands of two bits. The operation result will be encoded in BCD (Binary Coded Decimal) which has four bits. When there is error of arithmetic (a division by 0, for example) or when the result is not exact, there will be two separated outputs to show this result.
Check out the video after the break.