To determine how many packages of stickers are needed, we first need to calculate the surface area of the door stopper, which hasn't been provided. However, we can proceed with the assumption that the closest whole number of packages is what we are interested in.
Given that one package of stickers covers 75 square centimeters, you can calculate the number of packages needed by dividing the surface area by 75 cm².
The calculation is:
\[ \text{Number of packages} = \frac{\text{Surface Area}}{75} \]
You would round up to the next whole number since you can only purchase whole packages.
If we assume the surface area is, for example, close to 414.14 cm², the calculation would be:
\[ \text{Number of packages} = \frac{414.14}{75} \approx 5.52 \]
Since you need to purchase whole packages, you would round up to 6 packages.
From the options given, the best choice based on this example is:
You will need 6 packages of stickers.
If you have a specific surface area in mind or want to use a number different from 414.14 cm², you can divide that number by 75 and round accordingly to find the correct number of packages needed.