8. The product of $5.425 \times 0.63$ written in decimal form is
8. Solution: $5 . \dot{4} 2 \dot{5} \times 0.63=5 \frac{425}{999} \times 0.63=\frac{(5 \times 999+425) \times 0.63}{999}=\frac{34146}{9990}=3.4 \dot{18} \dot{0}$