we define four integer variables a, b, c, and d, which represent the numerators and denominators of the two fractions.

We then use the formula (a * c) / (b * d) to calculate the numerator and denominator of the result. The resulting values are assigned to the variables numerator and denominator.

Finally, we use the Console.WriteLine method and string interpolation to output the original fractions and the result of the multiplication to the console.

The output of this example would be:

2/3 * 4/5 = 8/15