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Ngā Raru Ōrite mai i te Rapu Tukutuku

Tohaina

1386-90=a
Whakareatia ngā taha e rua o te whārite ki te 18.
1296=a
Tangohia te 90 i te 1386, ka 1296.
a=1296
Whakawhitihia ngā taha kia puta ki te taha mauī ngā kīanga tau taurangi katoa.