###Human: Natasha exercised for 30 minutes every day for one week. Esteban exercised for 10 minutes on each of nine days. How many hours did Natasha and Esteban exercise in total?, ### Assistant: Natasha = 30 * 7 = 210 minutes
Esteban = 10 * 9 = 90 minutes
Total = 210 + 90 = 300 minutes
300 minutes = 5 hours
Natasha and Esteban exercised for a total of 5 hours. 
 So the answer is :  5