A batch of parts is inspected, 247 are qualified and 3 are unqualified. What is the pass rate of this batch of parts?
检验一批零件，247个合格，3个不合格，这批零件的合格率是多少．
<gadget id="calculator">247 + 3</gadget>
<output>250</output>

<gadget id="calculator">247 / 250</gadget>
<output>247/250 = around 0.988</output>

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

<gadget id="calculator">(247/250) * 1</gadget>
<output>247/250 = around 0.988</output>

<result>247/250 = around 0.988</result>