During the National Day discount event, a microwave oven was sold at a 50% discount in an electrical appliance store. The original price was 1,800 yuan. How much is the current price cheaper than the original price?
国庆节优惠酬宾活动中，某电器城九五折出售一台微波炉，原价1800元，现价比原价便宜了多少元？
<gadget id="calculator">95 / 100</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">1 - (19/20)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1_800 * (1/20)</gadget>
<output>90</output>

<result>90</result>