When it comes to calculating expressions involving fractions, it’s important to understand the concept of multiplying fractions. In this case, we have the expression 2/5 multiplied by 4/7. Let’s break it down step by step:

- Multiply the numerators: In our case, 2 multiplied by 4 equals 8.
- Multiply the denominators: Similarly, 5 multiplied by 7 gives us 35.

Now that we have the result of the multiplication for both the numerator and the denominator, we can simplify the fraction if needed. In our case, the fraction 8/35 cannot be further reduced because the numerator and denominator do not have any common factors other than 1.

So, the answer to the expression 2/5 multiplied by 4/7 is:

8/35

To make it easier to understand, here’s a recap:

- Expression: 2/5 multiplied by 4/7
- Step 1: Multiply the numerators: 2 * 4 = 8
- Step 2: Multiply the denominators: 5 * 7 = 35
- Result: 8/35

Remember, when multiplying fractions, always multiply the numerators together and the denominators together. This process allows us to find the product of the fractions and express it as a simplified fraction, if possible.

I hope this explanation clarifies how to calculate the expression 2/5 multiplied by 4/7. If you have any further questions, feel free to ask!