$(10$ points$)$ For the program below, describe what does it do using at most $20$ words, and find the value stored at the memory location labelled with RESULT after the program terminates.

Label Instruction

$.$ORIG x$3000$

LD R$2,$ ZERO LD R$0,$ M$0$ LD R$1,$ M$1$

LOOP BRz

ADD R$2,$ R$2,$ R$0$

ADD R$1,$ R$1,$ #$-1$ BRnzp LOOP

DONE ST HALT

RESULT $.$FILL ZERO $.$FILL

M$0.$FILL

M$1.$FILL

$.$END

R$2,$ RESULT

x$0000$ x$0000$ x$0004$ x$0803$