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Vertical photos of 1 and 4/3. I don't know the unit of measurement you said. If it is a pixel, then the photo is 2.5 million pixels, so you can only develop the A5 format photo (half of A4 copy paper) and then paste it.

2.72 k = 72×1024,7000 pixels, which is very low. Generally speaking, the mainstream small DC pixels are more than 8 million.

3, the mobile phone can take pictures without spending money.