A store increases the price of a garment with a cost price of 125 yuan by 40% and sells it at a 20% discount. What is the profit margin per piece of this garment?
一家商店将成本价125元的服装提高40%后标价，又以8折优惠卖出，那么这种服装每件的利润率是多少？
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">125 * (7/5) * (4/5)</gadget>
<output>140</output>

<gadget id="calculator">140 - 125</gadget>
<output>15</output>

<gadget id="calculator">15 / 125</gadget>
<output>3/25 = around 0.12</output>

<result>3/25 = around 0.12</result>