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# string interpolation

Using these values, we want to compute the product and print out the product in a formatted string.

Step 1: Declare a constant named product and assign the result of multiplying firstValue and secondValue together. (To multiply two values, a and b, we write a * b).

Step 2: Using string interpolation, create a string literal that describes the operation we just performed. For example, given the following values for firstValue, secondValue and product respectively: 2, 4, 8. The string should read: "The product of 2 times 4 is 8". Assign this string to a constant named output.

types.swift
```// Enter your code below
let firstValue: Int = 2
let secondValue: Int = 4
let product = firstValue * secondValue
let output = "\(firstValue) * \(secondValue) = \(product)"
```

@markperez2, you're on the right track. The last part of tells you what the string should like: The string should read: "The product of 2 times 4 is 8". This is what the string should literally say, but you have to use interpolation to get there. Here's what you're looking for:

```// You're just substituting where the numbers are with the constants using interpolation.
let output = "The product of \(firstValue) times \(secondValue) is \(product)"
```

Thank you! ?