supermarket is holding a "buy three get one free" promotional activity for clothing. Aunt Wang bought back 4 pairs of socks of the same style, so the actual price of each pair of socks is equivalent to the marked price.
某超市正举行穿着类"买三送一"的促销活动，王阿姨买回4双同款式的袜子，那么每双袜子的实际售价相当于标价的多少．
<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>