The original price of a set of suits in a store is 800 yuan. If it is sold at a 20% discount, each suit can still make a profit of 140 yuan. Find the profit margin of each suit priced.
一商店原来一套西服的定价为800元，如打八折出售，每套仍能获利140元，求这种西服每套定价的利润率．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">800 * (4/5)</gadget>
<output>640</output>

<gadget id="calculator">640 - 140</gadget>
<output>500</output>

<gadget id="calculator">140 / 500</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(7/25) * 1</gadget>
<output>7/25 = around 0.28</output>

<result>7/25 = around 0.28</result>