old_contents: // Write a function that returns the product of a number after it has been increased by X exponents.
  // Parameter A can be the number, and parameter B can be the exponent.
  function exponent(a, b) {
    // Your code goes here.
  }
  
  module.exports = exponent;
new_contents: // Write a function that returns the product of a number after it has been increased by X exponents.
  // Parameter A can be the number, and parameter B can be the exponent.
  function exponent(a, b = 2) {
    var result = 1;
    for (var i = 0; i < b; i++) {
      result *= a;
    }
    return result;
  }
  
  module.exports = exponent;
  
subject: Fix exponent function