A factory produced 500 parts, and 6 failed. What is the pass rate of this batch of parts?
某工厂生产了500个零件，不合格的有6个，这批零件的合格率是多少．
<gadget id="calculator">500 - 6</gadget>
<output>494</output>

<gadget id="calculator">494 / 500</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>