tolong kk kk... sertakan cara penyelesaian. tq

[tex]3\frac{1}{2} \times 5 \frac{1}{3} \\ = \frac{7}{2} \times \frac{16}{3} \\ = \frac{7}{1} \times \frac{8}{3} \\ = \frac{56}{3} \\ = 18 \frac{2}{3} [/tex]
btw kok hasilnya kok -5/28 semua :"0