There is a series of numbers 1, 7, 13, 19, 25, ... What is the 1000th number in this series of numbers.
有一串数1、7、13、19、25、…这列数的第1000个数是多少．
<gadget id="calculator">1_000 - 1</gadget>
<output>999</output>

<gadget id="calculator">999 * 6</gadget>
<output>5_994</output>

<gadget id="calculator">1 + 5_994</gadget>
<output>5_995</output>

<result>5_995</result>