The instructor for the study of imaginary beasts, Balam Shichiro, can't help but touch any living creature he comes in contact with. Because he looks rather terrifying, the students are generally pretty scared of him. During class, Balam notices that Iruma doesn't have wings on his back. If it's found out  that Iruma is a human in the netherworld, only trouble awaits. But despite all of this, Iruma says the most surprising thing to Balam...
I put together all the ways 
to figure out the calculations.
.جمعت كلّ الطّرق لمعرفة الحسابات
Schau dir diese Überschlagsrechnung an.
Resumí cómo hacer las cuentas.
He resumido cómo hacer las cuentas.
Je t’ai résumé
les formules de calcul.
Io ho messo insieme 
tutti i modi di risolvere i calcoli.
Eu já resumi como fazer todos os cálculos.
Вот тут все способы вести счёт.