For the first time, cut a piece of paper into 6 pieces and put them in an empty box; for the second time, take out a piece of paper from the box, cut it into 6 pieces, and put them in the same box; Take out a piece of paper from the box, cut it into 6 small sheets, and put them in the same box; ... do this continuously, and after n times, there are 666 pieces of paper in the box. Find the value of n.
第1次把一张纸剪成6小张，放入一只空箱中；第2次从箱中取出一张纸，把它剪成6小张，放入同一箱中；第3次又从箱中取出一张纸，又把它剪成6小张，放入同一箱中；…这样一直做下去，做n次后箱中共有666张纸．求n的值．
<gadget id="calculator">666 - 1</gadget>
<output>665</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">665 / 5</gadget>
<output>133</output>

<result>133</result>