Which two numbers (not digits) and which two signs should be interchanged to make the following equation correct?

24 ÷ 3 × 2 + 8 - 18 = 21​​

Correct option is B

New Expression: 8 + 3 × 2 ÷ 24 - 18 = 21

8 + 3 × $$\frac{1}{12}$$​ - 18 = 21

8 + $$\frac{1}{4}$$ - 18 = 21

(Not integer)