You can make three different groups of three out of nine.
9/3=3
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because multiplying is like grouping. so 2 x 5 is 2 groups of 5 added together. so 9 groups of 1/3 equals 3.
72/8 = 9 and 3*9 = 27 and 5*9 = 45
There are several different ways. Here's one: [8] [1] [6] [3] [5] [7] [4] [9] [2]
( 9+ ( 6 x 3 ) ) / 3 = 9