To find out how much dog food Stanley's dog will eat in 13 days, you can multiply the daily food consumption by the number of days:
\[ \text{Total food} = \text{Daily food} \times \text{Number of days} \] \[ \text{Total food} = 0.7 \text{ kg/day} \times 13 \text{ days} \]
Calculating this gives:
\[ \text{Total food} = 0.7 \times 13 = 9.1 \text{ kg} \]
Therefore, Stanley's dog will eat 9.1 kilograms of dog food in 13 days.