The uncle bought back a batch of apples with 4,000 yuan, and then sold them at 115% of the purchase price. According to regulations, the uncle should pay a tax of 25% of the profits. How much should the uncle pay?
叔叔用4000元钱买回一批苹果，然后按进价的115%出售，按规定，叔叔应缴纳利润的25%税款，叔叔应该缴纳多少元？
<gadget id="calculator">115 / 100</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">4_000 * (23/20)</gadget>
<output>4_600</output>

<gadget id="calculator">4_600 - 4_000</gadget>
<output>600</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">600 * (1/4)</gadget>
<output>150</output>

<result>150</result>