 
 <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. <ibo> Ihe mgbako Brody nwere 60 * 1 / 4 = 60 / 4 = awa 15 batrị fọdụrụ. Mgbe ule mgbakọ na mwepụ ya nke were awa 2 gasịrị, batrị nke ígwè Brody ga-adịru awa 15 - 2 = 13. Ya mere, azịza ikpeazụ bụ 13. 