A kind of fresh milk is sold at a 10% discount, which means that the selling price is the original price
一种鲜奶打9折出售，就是说售价是原价的多少
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>