Answer: Here's a program in assembly language that reads a two-digit number, an operator, and another two-digit number, and then displays the formula and the result:
```
ORG 100h
MOV AH, 1h ; read first digit
INT 21h
SUB AL, 30h
MOV BL, AL ; save first digit
MOV AH, 1h ; read second digit
INT 21h
SUB AL, 30h
MOV CL, AL ; save second digit
MOV AH, 1h ; read operator
INT 21h
MOV DL, AL ; save operator
MOV AH, 1h ; read third digit
INT 21h
SUB AL, 30h
MOV BH, AL ; save third digit
MOV AH, 1h ; read fourth digit
INT 21h
SUB AL, 30h
MOV CH, AL ; save fourth digit
CMP DL, '+' ; check operator
JE ADDITION
CMP DL, '-' ; check operator
JE SUBTRACTION
CMP DL, '*' ; check operator
JE MULTIPLICATION
CMP DL, '/' ; check operator
JE DIVISION
JMP EXIT
ADDITION:
MOV AL, BL ; move first digit to AL
ADD AL, BH ; add third digit to AL
JC CARRY_ADD
MOV CL, DL ; move operator to CL
MOV AH, 2h ; display formula
INT 21h
MOV AH, 0 ; clear AH
MOV DL, AL ; move result to DL
ADD DL, 30h ; convert result to ASCII
JMP DISPLAY
CARRY_ADD:
ADD AL, 30h ; convert first digit to ASCII
MOV DL, '1' ; set carry flag
JMP DISPLAY
SUBTRACTION:
MOV AL, BL ; move first digit to AL
SUB AL, BH ; subtract third digit from AL
JC CARRY_SUB
MOV CL, DL ; move operator to CL
MOV AH, 2h ; display formula
INT 21h
MOV AH, 0 ; clear AH
MOV DL, AL ; move result to DL
ADD DL, 30h ; convert result to ASCII
JMP DISPLAY
CARRY_SUB:
SUB AL, 30h ; convert first digit to ASCII
MOV DL, '1' ; set carry flag
JMP DISPLAY
MULTIPLICATION:
MOV AX, BX ; move first digit to AX
MUL CH ; multiply fourth digit by AL
MOV CL, DL ; move low byte of result to CL
MOV AL, BL ; move second digit to AL
MUL BH ; multiply third digit by AL
ADD AX, CX ; add low byte of previous multiplication
MOV CL, DL ; move low byte of result to CL
MOV AH, 2h ; display formula
INT 21h
MOV AH, 0 ; clear AH
MOV DL, CL ; move low byte of result to DL
ADD DL, 30h ; convert result to ASCII
JMP DISPLAY
DIVISION:
MOV AL, BL ; move first digit to AL
MOV AH, 0 ; clear AH
DIV BH ; divide second digit by AL
MOV CL, AL ; move quotient to CL
MOV AL, BL ; move first digit to AL
MOV AH, 0 ; clear AH
MUL CL ; multiply first digit by quotient
MOV CL, DL ; move low byte of result to CL
SUB AH, AH ; clear AH
MOV DL, BH ; move third digit to DL
DIV CL ; divide third digit by low byte of result
MOV AH, 2h ; display formula
INT 21h
MOV AH,
```
Hope this helps! :^)