It would be helpful if you rephrased your question...
If you mean:
7 * 1/3, then you could do the following:
Turn 7 into a fraction...
7/1 * 1/3
And then multiply the numerators together for the numerator of the solution and the denominators together for the denominator of the solution.
7*1 = 7
1*3 = 3
You would get 7/3, which simplifies to 2 1/3.
However, if you meant (7*1)/3, you would solve what's in the parenthesis....
(7)/3
And get 7/3, simplifying to 2 1/3.
Either way, the solutions are the same!