'''
Given an arithmetic equation consisting of positive integers, +, -, * and / (no parentheses), compute the result.

Example:
    Input: 2*3+5/6*3+15
    Output: 23.5

Hints: 521, 624, 665, 698
'''


def calculator(s):
    pass

if __name__ == '__main__':
    assert calculator('') ==
    assert calculator('') ==
    assert calculator('') ==
    assert calculator('') ==
    assert calculator('') ==
