Which is the fraction button?

Not all calculators have 'Fraction Buttons'      You may have to just divide the fraction out, i.e. 4/3  is 4 divided by 3.     SOME calculators MAY have a button that show x/y as the fraction button.   SOME calculators are as answered in answer #1

$${\frac{{\mathtt{4}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{\pi}}{\mathtt{\,\times\,}}{{\mathtt{6}}}^{{\mathtt{3}}} = {\mathtt{904.778\: \!684\: \!233\: \!860\: \!452\: \!7}}$$

the fraction button  is  left  of  the great  C   (web2.0calc )     You see this:   /