Print A3 (portrait) on 2x A4 with HP D1560

I have a few drawings set up in A3 Portait, I want to print them as a 'Poster' using my Deskjet.

I thought that one A3 (portrait) equals 2 A4 (landscape).

Perhaps it could be a few millimeters less on the A3, due to 'cover space'.

Strangely enough nly option I get is to print it on 4 portrait A4 sheets. 

a: it is a waste

b: not very handy, one has to cut more paper.

Anyone an idea?

I use windows 10; Coreldraw X7; HP Deskjet D1560