Risolvi la seguente moltiplicazione

$$\frac{51}{45}\times\frac{5}{7}\times\frac{9}{17}\times\frac{56}{3}=$$

$$\frac{51}{17}\times\frac{5}{7}\times\frac{9}{45}\times\frac{56}{3}=$$

$$M.C.D.(51;17)=17\quad M.C.D.(9;45)=5$$

$$3\times\frac{5}{7}\times\frac{1}{5}\times\frac{56}{3}=$$

$$\frac{3}{3}\times\frac{5}{7}\times\frac{1}{5}\times56=$$

$$\frac{5}{7}\times\frac{1}{5}\times56=$$

$$5\times\frac{56}{35}$$

$$M.C.D.(56;35)=7$$

$$5\times\frac{8}{5}=$$

$$8$$