Answer:
[tex]\frac{637}{32} or 19\frac{29}{32}[/tex]
Step-by-step explanation:
first you have to put them into improper fractions
[tex]3\frac{1}{4}[/tex] → [tex]\frac{13}{4}[/tex]
[tex]6\frac{1}{8}[/tex] → [tex]\frac{49}{8}[/tex]
[tex]\frac{13}{4}*\frac{49}{8}=\frac{637}{32}=19\frac{29}{32}[/tex]