Give the step-by-step reasoning process and then the final answer. Claire wants to make 2 cakes for her mother. Two packages of flour are required for making a cake. If 1 package of flour is $3, how much does she pay for the flour that is enough to make 2 cakes?
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She needs 2 * 2 = 4 packages of flour for 2 cakes. 4 packages of flour cost 4 * $3 = $12.
The final answer: 12.
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