Hey @Hojhoj,
Welcome to the HP Support Forums!
I understand that you are trying to print multiple pages per sheet from your Android to your Deskjet Ink Advantage 3545 e-All-In-One Printer. As the Android is a simple operating system, neither the print plugin nor the HP ePrint app are able to print multiple pages per sheet. If you are needing to do so, your options would be to either modify the file to make it look like you have multiple pages per sheet before printing or to use a Windows PC or Mac to print your document instead.
Please let me know if you have any other questions. Otherwise, have a great week!
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~DocCottle I work on behalf of HP
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