Kevin goes for a vacation with $1404 for his expanses. If he extends his vacation by 3 days, he has to cut down his daily expanses by $3. Find original duration of his vacation.

3195 cans are stored in a warehouse in such a manner that there are 262 cans in the bottom row, 255 cans in the second row, 248 cans in the third row, and so on. How many rows of cans are there?