$=325\cdot \frac{1}{10^{8}}$
$10^{8}=100000000$$=325\cdot \frac{1}{100000000}$
Convert element to fraction $325=\frac{325}{1}$$=\frac{325}{1}\cdot \frac{1}{100000000}$
Apply the fraction rule $\frac{a}{b}\cdot \frac{c}{d}=\frac{a\:\cdot \:c}{b\:\cdot \:d}$$=\frac{325\cdot 1}{1\cdot 100000000}$
$\frac{325\cdot 1}{1\cdot 100000000}=\frac{325}{100000000}$$=\frac{325}{100000000}$
Factor the number: $ 325=25\cdot 13$$=\frac{25\cdot 13}{100000000}$
Factor the number: $ 100000000=25\cdot 4000000$$=\frac{25\cdot 13}{25\cdot 4000000}$
Cancel the common factor: $ 25$$=\frac{13}{4000000}$