Answers:
- Original = 1 ----> Enlarged = 6
- Original = 7 ----> Enlarged = 42
- Original = 2.5 ----> Enlarged = 15
- Original = 6 ----> Enlarged = 30
It looks like you have the correct order. To get those answers above, we simply multiply the original length by the scale factor 6.
Example: 7*6 = 42
30 + 8d = 102
8d = 102 - 30
8d = 72
d = 72/8
d = 9....you would have to walk 9 dogs