The price of a 5000 yuan laptop is reduced (1/10) and then increased (1/10). What is the current price?
一台5000元的笔记本电脑先降价(1/10)，再涨价(1/10)，现价是多少元？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

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

<gadget id="calculator">5_000 * (9/10) * (11/10)</gadget>
<output>4_950</output>

<result>4_950</result>