What is the value of 9 of 21 × (3+4)?

Correct option is A

Given:
 9 of 21 × (3+4)
Concept Used:
​$$\begin{array}{|c|c|} \hline \textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & ^x(power), √ (root) , of \\ \hline \text{Division}& ÷ \\\hline \text{Multiplication} & × \\ \hline \text{Addition} & + \\ \hline \text{Subtraction} & - \\\hline\end{array}$$​​
Solution:
9 of 21 × (3+4) 
= 9 of 21 × 7 
= 9× 21 × 7  
= 1323