A person’s wages for half a year are 5,200 yuan and a cow. He was fired after working for four months. When he was fired, his salary was 2,800 yuan and a cow. How much is the price of the cow?
某人工作半年的工资是5200元和一头牛，工作四个月他被辞退，辞退时获得的工资是2800元和一头牛，求这头牛的价钱是多少元？
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">5_200 * (2/3)</gadget>
<output>10_400/3 = around 3_466.666667</output>

<gadget id="calculator">(10_400/3) - 2_800</gadget>
<output>2_000/3 = around 666.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2_000/3) / (1/3)</gadget>
<output>2_000</output>

<result>2_000</result>