Steven's teacher sends the class an assignment to collect 60 different fruit seeds. Apples average 6 seeds, pears average 2 seeds, and grapes average 3 seeds. Steven has set aside 4 apples, 3 pears, and 9 grapes to extract their seeds. How many more seeds does he need to fulfill his assignment?
With 4 apples, Steven will collect 4 apples * 6 seeds/apple = <<4*6=24>>24 seeds.
With 3 pears, Steven will collect 3 pears * 2 seeds/pear = <<3*2=6>>6 seeds.
With 9 grapes, Steven will collect 9 grapes * 3 seeds/grape = <<9*3=27>>27 seeds.
In total, Steven will collect 24 seeds + 6 seeds + 27 seeds = <<24+6+27=57>>57 seeds.
To collect 60 seeds he needs 60 seeds - 57 seeds = <<60-57=3>>3 more seeds.
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