A, B, and C bought 9 loaves together and shared them equally. A took out the money for 5 loaves, B took out the money for 4 loaves, and C didn't bring any money. After eating half, C should take out 6 yuan, so how much should A get back.
甲乙丙三人一起买了9个面包，平均分着吃，甲拿出5个面包的钱，乙拿出四个面包的钱，丙没带钱．吃完一半，丙应该拿出6元钱，那么甲应该收回多少钱．
<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">6 / 3</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<result>4</result>