It may not seem like much, but this means your piano is toast. Unless you are willing to pay a few thousand dollars to repair it (moving to and from workshop, lowering all string tension, filling cracks with epoxy, bolting the piano together with long steel bolts, multiple tunings, might as well clean the dust out) you should toss it and get a new one. Cheap pianos with structural failure like this are not worth repairing, do not stay in tune, and leaving it like it is is actually somewhat dangerous.
