Theo can eat 13 cookies, 3 times a day, 20 days each month. How many cookies can he eat in 3 months?
The total amount of cookies he can eat in a day is 13 x 3 = <T>multiply(13, 3)=39
The total amount of cookies he can eat in a month is 39 x 20 = <T>multiply(39, 20)=780
Therefore, the total amount of cookies he can eat in 3 months is 780 x 3 = <T>multiply(780, 3)=2340
