The price of each type A refrigerator sold in the mall is 2,000 yuan, and the daily power consumption is 1 degree, while the price of each type B refrigerator is 10% higher than that of the A type refrigerator, but the daily power consumption is only 0.6 degrees ． Now the mall decides to sell A-type refrigerators at a discount. Ask: How much discount should the mall offer at least for consumers to buy A-type refrigerators? (Each refrigerator is calculated based on the use period of 10 years, 365 days per year, and 0.50 yuan per kilowatt-hour of electricity. The result is reserved as an integer)
商场出售的A型冰箱每台售价2000元，每日耗电量为1度，而B型冰箱每台售价虽然比A型冰箱高出10%，但每日耗电量却只有0.6度．现在商场决定将A型冰箱打折出售，问：商场至少打几折，消费者购买A型冰箱才合算？(每台冰箱按使用期10年，每年365天，每度电费0.50元计算．结果保留整折数)
<result>7</result>