To solve the problem of multiplying a mixed number by a whole number, we first convert the mixed number to an improper fraction. Then, we multiply the improper fraction by the whole number and simplify the result if possible.
Step 1: Convert the Mixed Number to an Improper Fraction
The mixed number \( 1 \frac{1}{3} \) can be converted to an improper fraction as follows:
\[
1 \frac{1}{3} = 1 + \frac{1}{3} = \frac{3}{3} + \frac{1}{3} = \frac{4}{3}
\]
Step 2: Multiply the Improper Fraction by the Whole Number
Next, we multiply the improper fraction \( \frac{4}{3} \) by the whole number \( 5 \):
\[
\frac{4}{3} \cdot 5 = \frac{4 \cdot 5}{3} = \frac{20}{3}
\]
Step 3: Simplify the Result
The result \( \frac{20}{3} \) is already in its simplest form, as there are no common factors between the numerator and the denominator.
Final Answer
The final result of the multiplication is
\[
\boxed{\frac{20}{3}}
\]