The original price of a notebook computer is 4,000 yuan, the price is first increased (1/10), and then the price is reduced (1/5), how much is the current price?
一种笔记本电脑原价4000元，先涨价(1/10)，后降价(1/5)，现价的售价是多少元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4_000 * (11/10) * (4/5)</gadget>
<output>3_520</output>

<result>3_520</result>