Bernie loves eating chocolate. He buys two chocolates every week at the local store. One chocolate costs him $3. In a different store, there is a long-term promotion, during which each chocolate costs only $2. How much would Bernie save in three weeks, if he would buy his chocolates in this store instead of his local one?
During three weeks, Bernie buys 3 * 2 = <<3*2=6>>6 chocolates.
In the local store, he pays for them 6 * 3 = $<<6*3=18>>18.
If Bernie would buy the same chocolates in the different store, he would pay 6 * 2 = $<<6*2=12>>12.
So Bernie would be able to save 18 - 12 = $<<18-12=6>>6.
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