A coat was priced at 260 yuan, and later it was sold at a 30% discount, which was much cheaper.
一件上衣售价260元，后来打七折出售，便宜了多少元．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">1 - (7/10)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">260 * (3/10)</gadget>
<output>78</output>

<result>78</result>