The Kingdom of Science will need rations to last them through their voyage to the other side of the world. But Senku, being no professional, burns all the bread he attempts to bake.
Don't you need that, er, 
"yeast" stuff to make bread?
ألا تحتاج للخميرة من أجل صنع الخبز؟
Não precisa... Levedura ou 
coisa assim para fazer pão?
Разве можно делать хлеб без этих…
как их там, дрожжевых грибов?