The price of a set of clothes is 200 yuan more expensive than that of a set of clothes.
甲套衣服比乙套衣服标价贵200元，后来促销活动中两套衣服都打八折销售，此时甲套衣服比乙套衣服贵多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">500 * (4/5)</gadget>
<output>400</output>

<gadget id="calculator">500 - 200</gadget>
<output>300</output>

<gadget id="calculator">300 * (4/5)</gadget>
<output>240</output>

<gadget id="calculator">400 - 240</gadget>
<output>160</output>

<result>160</result>