Turn them into mixed fractions first:
3 1/2 = 7/2 and 4 2/3 = 14/3
Then multiply the fractions:
7/2 x 14/3
Make sure you multiply the denominators together and multiply the numerators together, straight across.
7/2 x 14/3 = 98/6
Now simplify!
98/6 = 16 2/6 = 16 1/3
That’s your answer, 16 1/3