+ import std.math;
  import std.typecons;
- import std.math;
  /*
  Your task is to implement a function that will simplify the expression
-     x * n. The function returns true if x * n evaluates to a whole number and false
? ----

+ x * n. The function returns true if x * n evaluates to a whole number and false
-     otherwise. Both x and n, are string representation of a fraction, and have the following format,
? ----

+ otherwise. Both x and n, are string representation of a fraction, and have the following format,
-     <numerator>/<denominator> where both numerator and denominator are positive whole numbers.
? ----

+ <numerator>/<denominator> where both numerator and denominator are positive whole numbers.
- 
-     You can assume that x, and n are valid fractions, and do not have zero as denominator.
? ----

+ You can assume that x, and n are valid fractions, and do not have zero as denominator.
- 
-     >>> simplify("1/5", "5/1")
? ----

+ >>> simplify("1/5", "5/1")
-     true
+ true
-     >>> simplify("1/6", "2/1")
? ----

+ >>> simplify("1/6", "2/1")
-     false
+ false
-     >>> simplify("7/10", "10/2")
? ----

+ >>> simplify("7/10", "10/2")
+ false
-     false
-     
  */
  bool simplify(string x, string n)