Multiply $ \dfrac{1}{4x^{26}} $ by $ 5 $ to get $ \dfrac{ 5 }{ 4x^{26} } $.

Step 1: Write $ 5 $ as a fraction by putting $ \color{red}{ 1 } $ in the denominator.

Step 2: Multiply numerators and denominators.

Step 3: Simplify numerator and denominator.

$$ \begin{aligned} \frac{1}{4x^{26}} \cdot 5 & \xlongequal{\text{Step 1}} \frac{1}{4x^{26}} \cdot \frac{5}{\color{red}{1}} \xlongequal{\text{Step 2}} \frac{ 1 \cdot 5 }{ 4x^{26} \cdot 1 } = \\[1ex] & \xlongequal{\text{Step 3}} \frac{ 5 }{ 4x^{26} } \end{aligned} $$

$$ 3 x \cdot 3 = 9 x $$

Multiply $ \dfrac{5}{4x^{26}} $ by $ \dfrac{x}{9x} $ to get $ \dfrac{ 5x }{ 36x^{27} } $.

Step 1: Multiply numerators and denominators.

Step 2: Simplify numerator and denominator.

$$ \begin{aligned} \frac{5}{4x^{26}} \cdot \frac{x}{9x} & \xlongequal{\text{Step 1}} \frac{ 5 \cdot x }{ 4x^{26} \cdot 9x } \xlongequal{\text{Step 2}} \frac{ 5x }{ 36x^{27} } \end{aligned} $$