The original price of a TV is 2,000 yuan, and there is a 10% discount during the "October" National Day. How much can you save by buying such a TV?
一台电视机原价2000元，"十一"国庆期间九折优惠，买一台这样的电视机能省多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">2_000 * (9/10)</gadget>
<output>1_800</output>

<gadget id="calculator">2_000 - 1_800</gadget>
<output>200</output>

<result>200</result>