A piece of clothing is sold at a price of 46.4 yuan after a 20% discount. How much is the original price of this dress.
一件衣服打八折后以46.4元的价钱出售．这件衣服原价多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">46.4 / (4/5)</gadget>
<output>58</output>

<result>58</result>