There is a series of numbers, the first number is 6, the second number is 3, starting from the second number, each number is 5 less than the sum of the number before it and the number after it. So what is the sum of the 300 numbers from the first number to the 300th number in this series of numbers?
有一串数，第一个数是6，第二个数是3，从第二个数起，每个数都比它前面那个数与后面那个数的和小5．那么这串数中从第一个数起到第300个数为止的这300个数之和是多少．
<gadget id="calculator">300 / 6</gadget>
<output>50</output>

<gadget id="calculator">6 + 3 + 2 + 4 + 7 + 8</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<result>1_500</result>