There are three boxes of apples, A, B, and C. The number of apples in box A is twice that of box B, the number of apples in box C is half that of box B, the number of apples in box A is 54 more than box C, and the number of apples in box B is 54. How many apples are there.
有甲、乙、丙三箱苹果，甲箱的苹果个数是乙箱的2倍，丙箱的苹果个数是乙箱的一半，甲箱的苹果个数比丙箱多54个，乙箱装有苹果多少个．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 - (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">54 / (3/2)</gadget>
<output>36</output>

<result>36</result>