Systems, Matrices, and Determinants · Superchallenge problem

Solve the matrix equation $XA=B$ for $X$, where $A=\begin{bmatrix} 1 & 2 \\ 3 & 4 \end{bmatrix},\ B=\begin{bmatrix} 5 & 6 \\ 7 & 8 \end{bmatrix}$.