Personalised Photo Cards DPI Question For A Personalised Photo Product?

DPI Question for a Personalised Photo Product? - personalised photo cards

Find online in a personal photo puzzle to buy.

At the time, like I did to digital photography, a dimension of 2048x1536 (if I am in Explorer). If you are in color (I know!) Is described as 72dpi.

The website indicates that the file is at least 150 dpi is required.

The dimensions of the puzzle is made 470 x 710 mm

2:3 aspect ratio of the image (what is this?)

So that my voice .... I am full of this idea is?

Thanks

Sick!