Final answer:
The sum of 91 and 117 is 208. The phrase 'as their product GFC' in the student's question appears to be a typo and is not relevant to finding the sum of two numbers.
Step-by-step explanation:
The student's question seems to contain a typing error. The phrase 'as their product GFC' might be a typographical error and seems irrelevant to the calculation of the sum of two numbers. The correct task here is to add the numbers 91 and 117 to find their sum.
To find the sum of 91 and 117, you simply add the two numbers together:
- Start with the first number, 91.
- Add the second number, which is 117, to the first number.
- The sum of 91 and 117 is 208.
Therefore, the answer to the student's question is 208.