You don't need to make a boat to make iron float on water, you just need to make a ball and here you go, you have floating iron. Shades
Yeah but Charti was refering to war ships by saying to make iron float. Not just making iron float but thinking one step further. Or at least I got to this conclusion. (=・ω・=)
after reading the last chapter, I automatically google searched if iron can float on water lmao (〜 ̄△ ̄)〜 guess I don't want charti to be humiliated ╥﹏╥