For a batch of products, 99 pieces are qualified and 1 piece is unqualified. What is the pass rate?
一批产品，合格的有99件，不合格的有1件，它的合格率是多少．
<gadget id="calculator">99 + 1</gadget>
<output>100</output>

<gadget id="calculator">99 / 100</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>