What is 7 plus 7 plus 7 plus 7 plus 7 plus 7 plus 7?

The sum of 7 plus 7 plus 7 plus 7 plus 7 plus 7 plus 7 is 49. This can be calculated by adding each number together: 7 + 7 = 14, 14 + 7 = 21, 21 + 7 = 28, 28 + 7 = 35, 35 + 7 = 42, and finally 42 + 7 = 49.