Yes it’s right for this problem
For this case we have the following vectors:

The dot product of two vectors is a scalar.
The point product consists of multiplying component by component and then adding the result of the multiplication of each component.
For the product point of the vectors a and b we have:
Answer:
The product point of the vectors a and b is:
It would be written as a fraction to make the exponent negative put it over one : 1/7^4
The anser is 6/8 that what i think