How division was entered is fine, it appears that the desired solution is a real arithmetic value rather than an integer.  Hence, the 'Options' tab allows you to change from Integer to Real.  If you are working a problem with real numbers in it and your setting is Integer then something like "0.123" is converted to "123/1000" as part of the solution process and this gets quite confusing to someone trying to learn a reasonable solution process; conversely, the fraction "1/4" will not be simplified to "0.25" if your setting for arithmetics is Integer