Aunt Li bought 7.5 kilograms of cucumbers at the farmer's market, paid the salesperson 12 yuan, and got back 0.75 yuan. How much per kilogram of cucumber?
李阿姨在农贸市场买了7.5千克黄瓜，付给售货员12元，找回0.75元．每千克黄瓜多少元？
<gadget id="calculator">12 - 0.75</gadget>
<output>11.25</output>

<gadget id="calculator">11.25 / 7.5</gadget>
<output>1.5</output>

<result>1.5</result>