[tex] 3\frac{1}{3} [/tex] ÷ [tex] \frac{1}{3} [/tex]
= [tex] \frac{10}{3} [/tex] ÷ [tex] \frac{1}{3} [/tex] (you want [tex] 3\frac{1}{3} [/tex] to be one fraction)
= [tex] \frac{10}{3} [/tex] × [tex] \frac{3}{1} [/tex] (reciprocal of [tex] \frac{1}{3} [/tex] )
= [tex] \frac{30}{3} [/tex]
= 10