Hello, I keep getting error with my program on Marie language. $It$ keep giving $me$ a syntax error. The $<-isan$ arrow. Here the assignment: Using the MARIE computer assembly language, write a program that computes the following expression:

z $<-($a $*$ b$)+($c $*$ d$).$ The computer will read in the input values a$,$ b$,$ c$,$ and d from the keyboard, the final

result $($z$)$ has to be displayed. In addition, every time an input value is read in$,$ it must be validated by

checking that the input is a positive number. If it is positive display the number on the screen; otherwise

display zero and end the program. Remember that the MARIE instruction set does not have an instruction

to execute multiplication.

Here $ismy$ code: $//$ Variables and Constants

InputA, DEC $0//$ Variable to store input a

InputB, DEC $0//$ Variable to store input b

InputC, DEC $0//$ Variable to store input c

InputD, DEC $0//$ Variable to store input d

ResultZ, DEC $0//$ Variable to store the result z

Zero, DEC $0//$ Constant representing zero

$//$ Start of the program

Start, INP $//$ Input a

SKIPCOND $800//$ Check if input is positive

JUMP InputError $//$ Jump to InputError if input is not positive

STO InputA $//$ Store input in InputA

OUT $//$ Display the input

INP $//$ Input b

SKIPCOND $800//$ Check if input is positive

JUMP InputError $//$ Jump to InputError if input is not positive

STO InputB $//$ Store input in InputB

OUT $//$ Display the input

INP $//$ Input c

SKIPCOND $800//$ Check if input is positive

JUMP InputError $//$ Jump to InputError if input is not positive

STO InputC $//$ Store input in InputC

OUT $//$ Display the input

INP $//$ Input d

SKIPCOND $800//$ Check if input is positive

JUMP InputError $//$ Jump to InputError if input is not positive

STO InputD $//$ Store input in InputD

OUT $//$ Display the input

LDA InputA $//$ Load InputA into accumulator

MUL InputB $//$ Multiply accumulator with InputB

STO ResultZ $//$ Store result of first multiplication in ResultZ

LDA InputC $//$ Load InputC into accumulator

MUL InputD $//$ Multiply accumulator with InputD

ADD ResultZ $//$ Add result of second multiplication to ResultZ

OUT $//$ Display the final result

HLT $//$ Halt the program

$//$ Input error handling

InputError, LDA Zero $//$ Load $0$ into accumulator

OUT $//$ Display $0$

HLT $//$ Halt the program

$//$ End of program

END Start