What's the single digit number of 2007 power + 2008 Power * 444444 power 98

In 2007 / 5 more than 2, the corresponding single digit is 3; in 2008 / 5 more than 3, the corresponding single digit is 6; in 98 / 2 more than 0; so 3 + 6 * 6 = 39, the single digit is 9

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