What is the pixel size of A3 paper in PS

What is the pixel size of a3 paper in ps?

1. Open the A3 picture on the computer:

Resolution: 72 pixels/inch,

pixels: 1191*842

2. Output Picture:

Resolution: 300 pixels/inch

Pixels: 4961×3508

The resolution is not only related to the size of the display printing format, but also affected by the printing dot pitch and Affected by factors such as printing size, the smaller the dot pitch, the higher the resolution for the same printing size. For example, 800*600dpi, where 800 represents the number of dots displayed in the horizontal direction on the printing format, and 600 represents the number of dots displayed in the vertical direction.

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