JavaScript: Composition of operations

Suppose we want to calculate an expression such as 3 * 5 - 2. That is exactly how we would write it down:

console.log(3 * 5 - 2); // => 13

Note that the interpreter performs arithmetic operations in the right order: first division and multiplication, then addition and subtraction. Sometimes we want to change the order of calculations. We'll dig into this topic in the next lesson. Or another example:

console.log(2 * 4 * 5 * 10);

As you can see, we can combine operations, which allows us to compute even more complex compound expressions. To visualize how calculations are done inside the interpreter, let's look at an example: 2 * 4 * 5 * 10.

1. First we calculate 2 * 4 and get 8 * 5 * 10
2. Then we calculate 8 * 5, which gives us 40 * 10
3. Finally, do the last multiplication. The result will be 400

We can combine operations, making it possible to compute increasingly complex compound expressions.

Instructions

Write a program that calculates and prints the value of this expression:

8 / 2 + 5 - -3 / 2

Don't calculate anything manually, your program should do all the calculations on its own.