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When you write 10/3, it is assumed that you're making an integer division and so an integer is returned. Casting any of the numerator or denominator to decimal or float will make you get a result in decimal or float. eg
10.0/3 or 10.to_f/3
10/3.0 or 10/3.to_f
10.fdiv 3
10.0/3.0 or 10.to_f/3.to_f
All these will give you a fairly accurate result. However, it might not be 3.3333333333 as expected due to known issues with floating point numbers.
