batch of products is inspected, and the results show that 100 pieces are qualified and 25 pieces are unqualified. What is the pass rate of the products?
检验一批产品，结果有100件合格，25件不合格，产品合格率是多少．
<gadget id="calculator">100 + 25</gadget>
<output>125</output>

<gadget id="calculator">100 / 125</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * 1</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>