Pingping fruit store shipped a batch of fruits, when 90 boxes were sold, (5/6) of this batch of fruits happened to be sold, how many boxes of fruits are left?
萍萍水果店运来一批水果，当卖出90箱时，刚好卖了这批水果的(5/6)，还剩多少箱水果？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">90 / (5/6)</gadget>
<output>108</output>

<gadget id="calculator">108 - 90</gadget>
<output>18</output>

<result>18</result>