Jaden and his family are using a map to drive down to Napa Valley. On the map, the distance is given by the equation c = 1.3m, where c is the number of centimeters on the map and m is the corresponding real-world distance in miles.

If they cover a distance of 18 miles, that would mean a distance of
________ centimeters on the map.
Multiple choices: 24.5, or 23.4, or 13.84, or 0.07.