A batch of parts, after inspection, 398 pieces are qualified, and the other two are unqualified, what is the pass rate?
一批零件，经检验有398件合格，另两件不合格，合格率为多少．
<gadget id="calculator">398 + 2</gadget>
<output>400</output>

<gadget id="calculator">398 / 400</gadget>
<output>199/200 = around 0.995</output>

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

<gadget id="calculator">(199/200) * 1</gadget>
<output>199/200 = around 0.995</output>

<result>199/200 = around 0.995</result>