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First, turn the mixed numbers into fractions, then multiply.

Ex:

2 1/3 * 3 4/5 = 7/3 * 19/5 = 7*19/3*5 = 133/15

If you like to write the improper fraction as a mixed number:

133/15 = (8*15 + 13)/15 = 8*15/15 + 13/15 = 8 + 13/15 = 8 13/15

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