There is an array of three numbers, they are (1, 5, 10); (2, 10, 20); (3, 15, 30); ... what is the sum of the three numbers in the 99th array ．
有一列由三个数组成的数组，它们依次是(1，5，10)；(2，10，20)；(3，15，30)；…第99个数组内三个数的和是多少．
<gadget id="calculator">99 * 5</gadget>
<output>495</output>

<gadget id="calculator">99 * 10</gadget>
<output>990</output>

<gadget id="calculator">99 + 495 + 990</gadget>
<output>1_584</output>

<result>1_584</result>