Rational Number

Declare a rational() function that gets two natural numbers (a, b) and return a string containing a record of the rational number a / b in the form of a decimal fraction, possibly periodic.

Examples

rational(2, 5) ➞ "0.4"

rational(1, 6) ➞ "0.1(6)"

rational(1, 3) ➞ "0.(3)"

rational(1, 7) ➞ "0.(142857)"

rational(1, 77) ➞ "0.(012987)"

Notes

• Always a < b.
• The length of a periodic fraction can be more than 20 numbers
• You can find a hint in the Comments.