Calculator on MIPS (Assembly Language)

Develop a Calculator that has 5-functions (+, -, *, /, %), integer only Stack-based! RPN (Reverse Polish Notation), enter the first operand, press Enter, enter the second operand, press the operator Hexadecimal input and output x, y, z, w stack positions (do not do it like HP did it with the t-register) 32-bit operands, which means you may need to show 33-bits for addition and 64-bits for multiplication Accepted Compilers: MIPSym, MARS.... *MARS preferred.