Use
$a=\frac{ a }{ 1 }$ to convert the expression into a fraction
$\frac{ 9 }{ 1 } \times \frac{ 1 }{ 5 }$
To multiply the fractions, multiply the numerators and denominators separately
$\frac{ 9 \times 1 }{ 1 \times 5 }$
Any expression multiplied by
$1$ remains the same
$\frac{ 9 }{ 1 \times 5 }$
Any expression multiplied by
$1$ remains the same
$\begin{align*}&\frac{ 9 }{ 5 } \\&\begin{array} { l }1 \frac{ 4 }{ 5 },& 1.8\end{array}\end{align*}$