Write a function called l2lo(w) that takes a non-negative number w as input and returns a pair of numbers (l,o) such that w = l + o/16 and l is an integer and o is a non-negative number smaller than 16. Note that the solution l and o are unique.

Write a function in Python called calc_length that takes two arguments, the length of the string L and the temperature T. This function should compute the new length of the string, taking into account the thermal expansion of the string relative to 20 degress (C). That new length should be returned from the function when it is called.