John gave his fiancee a $4000 ring on their engagement day, a $2000 car as a gift on their wedding day, and a diamond brace twice as expensive as the ring he gave her during the engagement. What's the worth of the presents John gave to her fiancee?
Stream of thoughts:
14000
If John gave his fiancee a $4000 ring on their engagement day, a $2000 car as a gift on their wedding day, the total cost for the two presents is $4000 + $2000 = $6000.

He also gave his fiancee a diamond brace twice as expensive as the ring costing 2 * $4000 = $8000.

The total worth of the presents John gave to his fiancee is $6000 + $8000 = $14000.

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So, the answer is 14000