The original price of a certain brand of vertical air conditioner is 6660 yuan, and the discount is 25% during the National Day. How much can you save by buying such an air conditioner during the National Day?
某品牌立式空调机原价6660元，国庆节期间七五折优惠，国庆节期间买一台这样的空调可以节省多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">6_660 * (1/4)</gadget>
<output>1_665</output>

<result>1_665</result>