An analytical toxicologist uses thin-layer chromatography (TLC) to identify a synthetic cannabinoid in a seized sample.
The active compound, cannabinoid YYY, has an Rf R_f\,Rf value of 0.64.
On the TLC plate, the spot for cannabinoid Y Y\,Y is found to have traveled a distance that is 3.15 cm less than the distance traveled by the solvent front.
Calculate the distance traveled by the solvent front, in centimeters.