There is a birthday cake. Xiaohong ate (4/8) of this cake, and Xiaoming ate (3/8) of this cake. Which one of them ate more? How much more?
有一个生日蛋糕，小红吃了这块蛋糕的(4/8)，小明吃了这块蛋糕的(3/8)，他们两谁吃的多？多几分之几？
<gadget id="calculator">4 / 8</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>