The kindergarten bought a batch of toys and distributed 40 toys to the small class, which happened to be the middle class (5/8), and the number assigned to the middle class was the big class (8/9). How many are there in the big class?
幼儿园买来一批玩具，分给小班40个，正好是中班的(5/8)，中班分到的个数又是大班的(8/9)．大班分到多少个？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">8 / 9</gadget>
<output>8/9 = around 0.888889</output>

<gadget id="calculator">40 / (5/8) / (8/9)</gadget>
<output>72</output>

<result>72</result>