There are a batch of bricks on the construction site, two bricks on the top floor, 6 bricks on the second floor, 10 bricks on the third floor... (as shown in the picture), each floor is 4 more bricks than the previous one, and it is known that there are 2106 bricks on the bottom floor , how many bricks are there in total?
建筑工地有一批砖，最上层两块砖，第2层6块砖，第3层10块…(如图)，依次每层比其上一层多4块，已知最下层有2106块砖，这堆砖共有多少？
<gadget id="calculator">2 + 2_106</gadget>
<output>2_108</output>

<gadget id="calculator">2_106 + 2</gadget>
<output>2_108</output>

<gadget id="calculator">2_108 / 4</gadget>
<output>527</output>

<gadget id="calculator">527 / 2</gadget>
<output>527/2 = around 263.5</output>

<gadget id="calculator">2_108 * (527/2)</gadget>
<output>555_458</output>

<result>555_458</result>