Mom bought some apples, gave them to grandparents (1/3), and gave them to Mingming (1/3), but there were still 8 apples left. How many apples were there?
妈妈买了一些苹果，送给爷爷奶奶(1/3)，又送给明明余下的(1/3)，结果还剩下8个，这些苹果原来有多少个．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">8 / (2/3) / (2/3)</gadget>
<output>18</output>

<result>18</result>