An opaque bag contains 4 red balls, 3 yellow balls, and 1 white ball. Xiaojie took out a yellow ball for the first time and put it back into the bag, and then touched it for the second time. What is the probability of him touching the yellow ball for the second time (expressed in fractions).
一个不透明的袋子里装有4个红球，3个黄球，1个白球．小杰第一次摸出一个黄球后又放回袋子中，接着摸第二次．他第二次摸中黄球的可能性的大小是多少(用分数表示)．
<gadget id="calculator">4 + 3 + 1</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>