[There's a minute's pause between her question and Sanji's answer, as the chef is trying to imagine Ariel diligently mopping up all that water by herself, when she's never used one before and has made a mess that would make anyone else shrink back in horror.

... No, no. This is not going to work.]

Use the mop to absorb the water, and then drain it back into the bucket. But I think it might be easier to show you. [GETTING TO HIS FEET.] You don't mind if I help out, Ariel-chan?