Kohaku has located the treasure left behind by Byakuya and the others, but it's encased in concrete. Senku has to devise a plan to quietly get at the contents inside, so as to not alert the guards.
Sure, yeah, if only we had such 
a convenient assassin's gadget
أجل، صحيح، ليتنا نملك عدّة اغتيال مفيدة كتلك
Claro, sim, se tivéssemos uma 
ferramenta tão conveniente de assassinos