Out of 100 products, 2 are unqualified, what is the pass rate?
100个产品中，有2个不合格，合格率是多少．
<gadget id="calculator">100 - 2</gadget>
<output>98</output>

<gadget id="calculator">98 / 100</gadget>
<output>49/50 = around 0.98</output>

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

<gadget id="calculator">(49/50) * 1</gadget>
<output>49/50 = around 0.98</output>

<result>49/50 = around 0.98</result>