Xiao Pang has a box of chocolates, and eats 30 pieces, which is 6 pieces less than the remaining 2 times. How many pieces of chocolates are left in this box?
小胖有一盒巧克力，吃掉30粒，比剩下的2倍少6粒，这盒巧克力还剩下多少粒？
<gadget id="calculator">30 + 6</gadget>
<output>36</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<result>18</result>