Breaking a Nucleus in Half Releases Energy

When you break an atom into smaller elements, somehow that releases a whole bunch of energy. If i break a banana in two, or i briak myself una, or something like i don't get a lot of energye getting released, right? Like, things are breaking and bonds are breaking, but there's not a lot of lik where does that energy come from actually? Ye, well, if you do break a banana and half, or you break yourself or an half, you are breaking bonds. Those are chemical bonds, and the atoms are not changing. But when you break a nucleus in half, then the energy released is huge. And the reason it's much bigger is