Zoroku is making a trip to Yokohama to meet a client, so he takes Sana with him. Accompanied by Ichijo, Sana is impressed by the sight of the ocean and the robot-operated factory that she visits, and enjoys her day out to the fullest. Rejoined by Zoroku, the trio visits Chinatown, but then Asahi and Yonaga suddenly appear after being unseen ever since the research facility incident was resolved. The twins run away as Sana and Ichijo chase after them...
Well, in math, the methods 
and answers are all defined.
لأنّ الطرق والإجابات كلّها 
.معرّفة في الرياضيّات
En matemáticas, los métodos 
y respuestas están definidos.
En matemáticas, los métodos
y respuestas están definidos.
En calcul, il n’y a qu’une méthode
et qu’une bonne réponse.
Beh, nella matematica
procedimenti e risposte sono già definiti.
Bom, é que as contas e os resultados
são coisas que já estão definidas.
В математике определены способы и ответы.