運算練習題，已知有一數組Arr1[Num1，Num2，Num3]，求它們分別乘以另一數組Arr2[Num4,Num5]得到數組Arr3[Num6,Num7,Num8,Num9,Num10,Num11]，再求數組SumArr3的總和等于多少？求大佬使用ST結構文本循環語句完成告知思路和標簽定義，題目的意思相當于：Num1*Num4+Num2*Num4+Num3*Num4+Num1*Num5+Num2*Num5+Num3*Num5 = SumArr?

IF M800=1 THEN;
rr:=0;
ee:=0;
o:=0;
FOR rr := 0 TO 3 DO
    FOR ee :=0 TO 2 DO
        Arr3[o]:=    Arr1[rr]*Arr2[ee];
        o:=o+1;
      END_FOR;
END_FOR;
END_IF;