In the fourth grade picnic, the class bought 8kg of apples and 7kg of oranges, and the total cost was 61 yuan. A kilogram of apples costs 2 yuan more than a kilogram of oranges. How much is a kilogram of apples.
四年级野餐，班上买来8千克苹果和7千克桔子，一共用了61元．一千克苹果比一千克桔子贵2元．一千克苹果多少元．
<gadget id="calculator">7 * 2</gadget>
<output>14</output>

<gadget id="calculator">14 + 61</gadget>
<output>75</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<gadget id="calculator">75 / 15</gadget>
<output>5</output>

<result>5</result>