# Math operations on numbers in JavaScript

Addition:

`let a = 1 + 2; alert(a); // shows 3`

Subtraction:

`let b = 3 - 2; alert(b); // shows 1`

Multiplication:

`let c = 3 * 2; alert(c); // shows 6`

Division:

`let d = 4 / 2; alert(d); // shows 2`

Create the variable `a`. Write to it the sum of the numbers `1`, `2` and `3`. Display the contents of the variable `a`, using the function `alert`.

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