The original price of a product is 80 yuan, now it is sold with a 20% discount, and there is a 10% discount with a discount card. What is the price of this product after two discounts?
一件商品原价是80元，现在打八折销售，有优惠卡再打九折，这件商品两次打折后的价钱是多少元．
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">80 * (4/5) * (9/10)</gadget>
<output>288/5 = around 57.6</output>

<result>288/5 = around 57.6</result>