A fruit shop brings in 15 boxes of apples, and the number of boxes of pears is 20% less than that of apples, and (1/3) more than the number of boxes of bananas. How many boxes of bananas are brought in?
一个水果店运进苹果15箱，运进的梨的箱数比苹果少20%，比香蕉的箱数多(1/3)，运进香蕉多少箱？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">15 * (4/5)</gadget>
<output>12</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">12 / (4/3)</gadget>
<output>9</output>

<result>9</result>