Mom gave Xiaoqiang 56.7 yuan to buy 2 kilograms of bananas and 1.5 kilograms of apples. The money should just run out. As a result, the quantity he bought was reversed, so there was 0.7 yuan left. How much is an apple per kilogram?
妈妈给小强56.7元，让他去买2千克香蕉、1.5千克苹果，钱应该正好用完．结果他买的数量给弄颠倒了，因此还剩0.7元．苹果每千克多少元．
<gadget id="calculator">56.7 - 0.7</gadget>
<output>56</output>

<gadget id="calculator">56 * 2</gadget>
<output>112</output>

<gadget id="calculator">56.7 * 1.5</gadget>
<output>85.05</output>

<gadget id="calculator">112 - 85.05</gadget>
<output>26.95</output>

<gadget id="calculator">4 - 2.25</gadget>
<output>1.75</output>

<gadget id="calculator">26.95 / 1.75</gadget>
<output>15.4</output>

<result>15.4</result>