Solve {l}{A={(1*2*3*4)}}{a=M_{R}}{text{Solvefor}btext{where}}{b=a}

$$\left. \begin{array} { l } { A = {(1 \cdot 2 \cdot 3 \cdot 4)} }\\ { a = M_{R} }\\ { \text{Solve for } b \text{ where} } \\ { b = a } \end{array} \right.$$

Solve for A, a, M_R, b

$$A=24$$

$$a=b$$

$$M_{R}=b$$