$=16\times \frac{77}{2}$
Convert element to fraction $16=\frac{16}{1}$$=\frac{16}{1}\times \frac{77}{2}$
Apply the fraction rule $\frac{a}{b}\times \frac{c}{d}=\frac{a\:\times \:c}{b\:\times \:d}$$=\frac{16\times 77}{1\times 2}$
Multiply the numbers: $ 1\times 2=2$$=\frac{16\times 77}{2}$
Divide the numbers: $ \frac{16}{2}=8$$=8\times 77$
Multiply the numbers: $ 8\times 77=616$$=616$