Okay, I went through a lot of work to try solving this, so here goes!
First, turn the mixed numbers into improper fractions.
6 1/4 --> 25/4
3 3/5 --> 18/5
Next, we need to multiply the two improper fractions together.
25 x 18 450
--- --- = ---
4 x 5 20
Then, we need to turn 450/20 into a mixed number. To do this, we divide.
450/20=22 10/26
We're almost done. Last step is to simplify the mixed number, specifically 10/26. We need to find GCF of 10 and 26, which is 2.
10/2=5
26/2=13
= 5/13
FINAL ANSWER - 22 5/13
You're welcome.