A blouse is 70 yuan cheaper than the original price after a 20% discount. How much is the original price of this blouse?
一件上衣，打八折后比原价便宜了70元，这件上衣原价是多少元？
<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">70 / (1/5)</gadget>
<output>350</output>

<result>350</result>