The price of a set of children's clothing after a 20% discount is 13 yuan cheaper than the original price. How much is the original price of this set of children's clothing?
一套儿童服装打八折后的售价比原价便宜13元，这套儿童服装原来的售价是多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">13 / (1/5)</gadget>
<output>65</output>

<result>65</result>