The hostess spent 14 kg of potatoes in 7 days. If she spends the same amount of potatoes every day, how many kilograms of potatoes will she need for 28 days?

If the hostess spends 14 kg of potatoes in 7 days, she is using 14 kg / 7 days = 2 kg of potatoes per day. To find out how many kilograms of potatoes she will need for 28 days, we multiply the amount she uses per day by the number of days: 2 kg/day * 28 days = 56 kg. Therefore, the hostess will need 56 kg of potatoes for 28 days.