There are 500 pieces of a product, and 4 pieces are unqualified after inspection. What is the pass rate?
一种产品500件，经检验有4件不合格，合格率是多少
<gadget id="calculator">500 - 4</gadget>
<output>496</output>

<gadget id="calculator">496 / 500</gadget>
<output>124/125 = around 0.992</output>

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

<gadget id="calculator">(124/125) * 1</gadget>
<output>124/125 = around 0.992</output>

<result>124/125 = around 0.992</result>