The noise level of a library is about 40 decibels. The noise of traffic has a rating of about 85 decibels. How many times stronger is the noise of traffic than the noise of a library?

Use the formula $\displaystyle{d}={10}{\log{{\left(\frac{{P}}{{P}_{{0}}}\right)}}}\usepackage{cmbright}\Huge\$ to find the answer to the nearest hundredth.

The noise of traffic is about _____ times as strong as the noise of a library.