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Let a1,a2 , …, a10 be in AP and h1,h2...

Let `a_1,a_2 ` , …, `a_10` be in AP and `h_1,h_2`,,,, `h_10` be in HP. If `a_1=h_1=2` and `a_10 = h_10 =3` , then `a_4h_7` is ____.

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