Xiao Gang placed Go pieces, and placed 5 white pieces between every two black pieces, a total of 84 pieces. If the first one was a black piece, how many white pieces were placed in total?
小刚摆放围棋子，每两个黑棋子之间摆5个白棋子，共84个棋子，如果第一个摆的是黑棋子，一共摆了多少个白棋子？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">84 / 6</gadget>
<output>14</output>

<gadget id="calculator">14 * 5</gadget>
<output>70</output>

<result>70</result>