`input()` reads data entered by the user. The result of `input()` is initially a string. `split()` separates one input line into individual values using spaces. `map()` applies the specified conversion to each input value. The `+` operator adds numbers. The `*` operator multiplies numbers. `print()` displays the program result. Print only what the problem statement requires.

**Connection to this task.** The `*` operator multiplies numeric values. In formulas it naturally models repeated contribution, such as price × quantity, speed × time, or side × side. The expression `2 * (a + b)` shows how this idea is applied to the task data.