You don't have to puzzle over it!I'm taking the picture now~
What's 1+1=?Erm, Errrm, the 'ta' of 'rice field'!!The 田 (/ta/) of 田んぼ (/tanbo/); as there are many kanji that can be read as /ta/, you need to say which one it could be. This is the pretty much exactly the same joke as saying that 1+1='a window'.
