Mom wants to buy a set of "Children's Encyclopedia" for Xiaoming with a price tag of 140 yuan. Dangdang.com offers a 25% discount on the whole site, and Taobao Children's Bookstore can get a coupon of 8 yuan (you can directly Cash), which one is cheaper to buy, and how much is it cheaper?
妈妈要给小明买一套标价为140元的《少儿百科全书》，当当网全场七五折，淘宝童书馆"满100元减30元"还可以领一张8元的代金卷(可以直接抵现金)，在哪家买更便宜，便宜多少元？
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">140 * (3/4)</gadget>
<output>105</output>

<gadget id="calculator">100 - 38</gadget>
<output>62</output>

<gadget id="calculator">62 + 40</gadget>
<output>102</output>

<gadget id="calculator">105 - 102</gadget>
<output>3</output>

<result>3</result>