A store sells a color TV with an original price of 1,200 yuan. Now it is sold at a 10% discount. How much is it cheaper than the original price?
商店出售一种彩电，原价1200元，现打九折出售，比原价便宜多少元．
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">1 - (9/10)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1_200 * (1/10)</gadget>
<output>120</output>

<result>120</result>