[tex]\\ \rm\rightarrowtail 1\dfrac{2}{7}+2\dfrac{6}{7}[/tex]
[tex]\\ \rm\rightarrowtail \dfrac{9}{7}+\dfrac{20}{7}[/tex]
[tex]\\ \rm\rightarrowtail \dfrac{9+20}{7}[/tex]
[tex]\\ \rm\rightarrowtail \dfrac{29}{7}[/tex]
[tex]\\ \rm\rightarrowtail 4\dfrac{1}{7}[/tex]
