There were 28 trains arriving on time at the railway station on October 4, and 4 trains were delayed. What is the punctuality rate of the train station on this day?
火车站10月4日这一天正点到站的火车有28列，另外有4列火车误点．这天该火车站的正点率是多少？
<gadget id="calculator">28 + 4</gadget>
<output>32</output>

<gadget id="calculator">28 / 32</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(7/8) * 1</gadget>
<output>7/8 = around 0.875</output>

<result>7/8 = around 0.875</result>