Calculate Using String Operation

Create a function that takes two numbers and a mathematical operator and returns the result.

Examples

calculate(4, 9, "+") ➞ 13

calculate(12, 5, "-") ➞ 7

calculate(6, 3, "*") ➞ 18

calculate(25, 5, "//") ➞ 5

calculate(14, 3, "%") ➞ 2

calculate(7, 2, "/") ➞ 3.5

Notes

• Numbers can be negative.
• The only operations used are those in the examples above.