The original price of a commodity is 80 yuan, but now it is 20% lower than the original price. How much is the current price?
一种商品原价80元，现在比原来降低了20%，现价多少元？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 * (4/5)</gadget>
<output>64</output>

<result>64</result>