Hey there!
First, turn the mixed numbers into improper fractions . . .
4 1/2 = 9/2
3 5/6 = 23/6
Now, multiply both numerators and both denominators . . .
9 x 23 = 207
2 x 6 = 12
= 207/12
Simplifying 207/12 . . .
207/12 = 17 1/4
4 1/2 * 3 5/6 = 17 1/4
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Hope this helps, have a wonderful day!
:)