how we select a specific operation from user in calculator project when there are multiples functions in it?

%include "io.mac"
.DATA
;binary
prompt1	db 'For ADDITION enter: 1',0
	db 'For SUBTRACTION enter: 2 ',0
	db 'For MULTIPLICATION enter: 3 ',0
	db 'For DIVISION enter: 4 ',0
	db 'For PERCENTAGE enter: 5 ',0
	db 'For PERCENTAGE CHANGE enter: 6 ',0
	db 'For PERMUTATION enter: 7' ,0
	db 'For COMBINATION enter: 8 '
	db 'For COMPARISON enter: 9 ',0
	db 'For GCD enter: 10',0
	db 'For LCM enter: 11 ',0

;uniary operations
	db 'For FACTORIAL enter: 12',0			
	db 'For FIBBONACI enter: 13 ',0
	db 'For SQUARE enter: 14',0
	db 'For CUBE enter: 15 ',0
	db 'For MODULUS enter: 16',0
	db 'For check EVEN-ODD enter: 17' ,0
	db 'For SQUARE-ROOT enter: 18 ',0
	db 'For calculating FLOOR enter: 19 ',0
	db 'For calculating CEIL enter: 20 ',0
	db 'For caculating N-th POWER enter: 21 ',0
	db 'For 1-10 MULTIPLES of INTEGER enter: 22 ',0

;Geometry
	db 'For SLOPE enter: 23 ',0
	db 'For PYTHAGORAS THEOREM enter: 24 ',0
	db 'For HEROS FORMULA enter: 25 ' ,0
	db 'For calculating AVERAGE enter: 26 ',0	
;circle
	db 'For DEGREE to RADIAN enter: 27 ',0
	db 'For RADIAN to DEGREE enter: 28 ',0
	db 'For CIRCUMFERENCE of a circle enter: 29 ',0
	db 'For AREA of a CIRCLE enter: 30 ',0
	db 'For RADIUS of a CIRCLE enter: 31 ',0
;rectangle
	db 'For PERIMETER of a RECTANGLE enter: 32 ',0
	db 'FOR AREA of a RECTANGLE enter: 33 ',0
;square
	db 'For PERIMETER of a SQUARE enter: 34 ',0
	db 'For AREA of a SQUARE enter: 35 ',0
;triangle	
	db 'For PERIMETER of a TRIANGLE enter: 36 ',0
	db 'For AREA of a RIGHT ANGLE TRIANGLE enter: 37 ',0

;physical quantities	
	db 'For calculating SPEED enter: 38 ',0
	db 'For calculating VELOCITY enter: 39 ',0
	db 'For calculating ACCELERATION enter: 40 ',0
	db 'For calculating FORCE enter: 41 ',0
	db 'For calculating POWER enter: 42 ',0
	db 'For calculating WORK done enter: 43 ',0
	db 'For calculating ENERGY enter: 44 ',0

;conversions from decimal
	db 'For DECIMAL to BINARY enter: 45 ',0
	db 'For DECIMAL to BASE-5 enter: 46 ',0
	db 'FOr DECIMAL to OCTAL enter: 47 ',0
	db 'For DECIMAL to HEXADECIMAL enter: 48 ',0

;conversion to decimal
	db 'For BINARY to DECIMAL enter: 49 ',0
	db 'For BASE-5 to DECIMAL enter: 50 ',0
	db 'For OCTAL to DECIMAL enter: 51 ',0
	db 'For HEXADECIMAL to DECIMAL enter: 52 ',0
	
;matrix 
	db 'For SCALER MULTIPLICATION of 2*2 MATRIX enter: 53 ',0
	db 'For DETERMINANT of 2*2 MATRIX enter: 54 ',0
	db 'For ADJOINT of 2*2 MATRIX enter: 55 ',0
	db 'For TRANSPOSE of 2*2 MATRIX enter: 56 ',0
	db 'For INVERSE of 2*2 MATRIX enter: 57 ',0
;sorting 
	db 'For SORTING enter: 58 ',0
	
nwln
db 'Select operation: 1-58 ',0
;take number from user 1-50 and then perform that operation