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Fill in the blanks in the fourth grade mathematics:
1. In a division formula without remainder, the sum of dividend, divisor and quotient is 189, quotient is 9, and dividend is (162).

2. choose. (Fill in the number of the correct answer in brackets)

A piece of paper with a length of 19CM and a width of 12cm can cut out at most (c) circles with a diameter of 3cm.

A.4 B.6 c.24 D.28