The original price of a computer is 5,000 yuan. During the "National Day" period, there is a 20% discount. How much can you save by buying a computer?
一台电脑原来售价5000元，"国庆节"期间八折优惠，购买一台电脑能省多少元．
<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">5_000 * (1/5)</gadget>
<output>1_000</output>

<result>1_000</result>