и) 13⋅39;

и) $$13 \cdot \frac{5}{39} = \frac{13}{1} \cdot \frac{5}{39} = \frac{13 \cdot 5}{1 \cdot 39} = \frac{65}{39} = \frac{5}{3} = 1\frac{2}{3}$$

Ответ: $$1\frac{2}{3}$$