A kind of clothes used to cost 200 yuan. During the sales promotion, the sales at store A were 20% off, and the sales at store B were reduced by 30%. Which store should you go to buy, and how much should you bring?
一种衣服原来都卖200元，在促销活动中，a店八折销售，b店减少三成销售，你应该到哪家店去买，只要带多少钱？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">200 * (7/10)</gadget>
<output>140</output>

<result>140</result>