A batch of parts, after inspection, 396 pieces are qualified and 4 pieces are unqualified. What is the pass rate?
一批零件，经检验有396件合格，4件不合格，合格率是多少．
<gadget id="calculator">396 + 4</gadget>
<output>400</output>

<gadget id="calculator">396 / 400</gadget>
<output>99/100 = around 0.99</output>

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

<gadget id="calculator">(99/100) * 1</gadget>
<output>99/100 = around 0.99</output>

<result>99/100 = around 0.99</result>