Answer:
1,170,000
Explanation:
The returns are 15% of 1,300,000.
15% of 1,300,000 = 15% * 1,300,000 = 0.15 * 1,300,000 = 195,000
In 1 month, 195,000 smartphones were returned.
In 6 months, 6 times as many smartphones were returned.
6 * 195,000 = 1,170,000
Answer: 1,170,000