Senku and the kingdom are going to need rations to be well during their attack on Tsukasa’s empire. There’s a science for that.
What if we set out in 
the middle of the night?
ماذا إن انطلقنا في منتصف الليل؟
Warum brecht ihr nicht
klammheimlich nachts auf?
¿Y si se marchan a medianoche?
¿Y si partís a medianoche?
Et si vous partiez pendant la nuit ?
Che ne dici se partiamo di notte, di nascosto?
E se partirmos no meio da noite?
Может, отправитесь тайком посреди ночи?