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## calc – 5-operation Calculator

Write a program that is able to perform 5 operations:
addition `+`

,
subtraction `-`

,
multiplication `*`

,
division `/`

or
exponentiation `^`

.

### Input and output

Input consists of several lines,
each with
a number *x*,
a character *o* and
another number *y*
separated by spaces where

-2 000 000.00 ≤ *x*, *y* ≤ 2 000 000.00

*o* is `+`

, `-`

, `*`

, `/`

or `^`

Output should contain a single line with the corresponding result
of applying operator *o* to *x* and *y*.
Output should be rounded to two decimal places.

Inputs are given so that the resulting value *r* is within the following range:

-2 000 000.00 ≤ r ≤ 2 000 000.00

#### Example input

```
1 + 2
3.5 * 6
7 - 12
20 / 3
-10 ^ 3
```

#### Example output

```
3.00
21.00
-5.00
6.67
-1000.00
```

### Scoring

- 1/5: works for the example input albeit in an incorrect format
- 2/5: works for the example input with the correct format
- 3/5: works for integer values
- 4/5: works for fractional values
- 5/5: works for edge cases

### Hints

In this exercise,
exponents may have decimal places.

try first: bmi

try next: factorial

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