The original price of a piece of children's clothing is 200 yuan. What is the current price after a 20% discount?
一件儿童服装原价200元，打八折后现价是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">200 * (4/5)</gadget>
<output>160</output>

<result>160</result>