 
 <translate> Brody’s calculator has 60 * 1 / 4 = 60 / 4 = 15 hours of battery left. After his 2 - hour math exam, Brody’s calculator will have 15 - 2 = 13 hours of battery left. So the final answer is 13. <hau> Injin lissafin Brody yana da 60 * 1 / 4 = 60 / 4 = awanni 15 na batir da suka rage. Bayan jarrabawar lissafi na sa'o'i biyu, na'urar lissafi ta Brody za ta rage batir na sa'o'i 15 - 2 = 13. Saboda haka amsar karshe ita ce 13. 