On National Day, Congcong's mother saw the same sweater in two shopping malls, A and B, which was very suitable for Congcong to wear. The original price of each piece is 120 yuan. But because of the festival, shopping mall A sells it at a 10% discount, while the price of shopping mall B remains unchanged. Mom thinks the weather is warm now and decides to buy it later. On New Year's Day, I went to two shopping malls A and B again, and saw that the price of this sweater in shopping mall A increased by 20% compared with the National Day, and the price of this sweater in shopping mall B increased by 10%. Mom wants to buy this sweater now, which store should I go to buy it cheaper? How much cheaper?
国庆节这天，聪聪的妈妈在甲乙两个商场看到同一款毛衣，很适合聪聪穿．每件原价都是120元．但因为过节，甲商场打九折出售，而乙商场价格不变．妈妈认为现在天气暖和，决定以后再买．元旦，又去了甲乙两个商场，看到甲商场这款毛衣比国庆节时提价20%，乙商场这款毛衣提价10%出售．妈妈想现在买这件毛衣，该去那家商场买比较便宜？便宜多少钱？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">120 * (11/10)</gadget>
<output>132</output>

<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">120 * (9/10) * (6/5)</gadget>
<output>648/5 = around 129.6</output>

<gadget id="calculator">132 - (648/5)</gadget>
<output>12/5 = around 2.4</output>

<result>12/5 = around 2.4</result>