What will come in the place of '? in the following equation, if '+' and '-' are interchanged and '×' and '÷' are interchanged?

357 × 7 + 19 ÷ 2 - 38 = ?

Given: 

357 × 7 + 19 ÷ 2 - 38 = ?

'+' and '-' are interchanged

'×' and '÷' are interchanged

​$$\begin{array}{|c|c|} \hline\textbf{Operation preference wise} & \textbf{Symbol} \\\hline\text{Brackets} &[],{}, () \\ \hline \text{Orders, of} & (power), √ (root) , of \\ \hline \text{Division}& ÷ \\ \hline \text{Multiplication} & × \\\hline \text{Addition} & + \\ \hline \text{Subtraction} & -\\\hline\end{array}$$​​

357 × 7 + 19 ÷ 2 - 38 = ?

After Interchanging the sign we get following equation - 

357 ÷ 7 - 19 × 2 + 38 = ?

51 - 19 × 2 + 38 = ?
51 - 38 + 38 = ?
51 = ?
Correct answer is (a) 51.