Jane sews 2 dresses a day for 7 days. Then she sews 3 dresses a day for the next 2 days. In the end, she adds 2 ribbons to each dress. How many ribbons does Jane use in total? Let's be accurate as possible.
In 7 days, Jane sews 2 * 7 = 14 dresses. In the next 2 days, Jane sews 3 * 2 = 6 dresses. Jane sews a total of 14 + 6 = 20 dresses. Jane uses a total of 20 * 2 = 40 ribbons.
The answer: 40.