[tex]\\ \bull\longmapsto 3.\dfrac{1}{3}[/tex]
[tex]\\ \bull\longmapsto 3\times \dfrac{1}{3}[/tex]
[tex]\\ \bull\longmapsto \dfrac{3}{3}[/tex]
[tex]\\ \bull\longmapsto 1[/tex]
Which describes us our multiplicative identity .
Which says
if x is a number then x×1/x=1