999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0

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999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0999...98(1997个9)*999...98(1997个9)+999...

999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0
999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0

999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾有多少个0
999...98(1997个9)不用看它,看第1,2,3个999...98的8,8*8是81,81+8是89,89*2是178,178就是999...98(1997个9)*999...98(1997个9)+999...98(1997个9)*2的末尾,所以,一个0也没