Math equation parser using shunting yard algorithm in Java
##Examples
Please enter a calculation: nine over eight plus four times two divide-by three Result: 3.79
Please enter a calculation: one plus two Result: 3
Please enter a calculation: one plus two times three Result: 7
Please enter a calculation: nine minus three times seven Result: -12
Please enter a calculation: four minus eight plus six times nine Result: 50
Please enter a calculation: seven over nine plus one Result: 1.78