The original price of a jacket is 400 yuan, the price is increased by 25% first, and then the price is reduced by 1/10 during promotional activities. What is the current price?
一件上衣原价400元，先提价25%，后来举行促销活动，降价(1/10)，现价多少元？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<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">400 * (5/4) * (9/10)</gadget>
<output>450</output>

<result>450</result>