If both items are measured in inches or feet, the half is the answer. Without more info. this cannot be answered.
It depends on the units used to measure the pavers: inches, centimetres, cubits, etc. It is not possible to answer the question without that information.
A 12x12 inch paver is one square foot. So you would need 240 square feet.
Multiply your width x depth to get square footage needed- 13 feet times 13 feet =169 pavers that are 12 inches by 12 inches. This assumes that the pavers will be placed right next to each other, with no grout or sand in between. if you plan to leave space for sand or grout, for instance, one row of 12 pavers with 1 inch between each paver will be 12 feet, 11 inches wide. If you go with this plan, you need 12 x12 pavers, or 144.
36 tiles. I would hire a tiler if I was you, this doesn't sound like your 'thing'
72
72
196
576 should do it.
216
78.47 Pavers
3
144 Assuming paver is 12x12 INCHES and patio is 12x12 FEET One paver in corner to start needs 12 of them for one row 12 feet along; then same upwards. So 12 times 12 pavers = 144 total.
362. Get 400 to be safe.
272 Get 300 to be safe.
144 Get 160 to be safe.
72 Get 80 to be safe.