Two boxes of the same pears, the first box weighs 24 kg, the second box weighs 27 kg, the first box is 1.2 yuan cheaper than the second box. How much is pear per kilogram?
两框同样的梨，第一筐重24千克，第二筐重27千克，第一框比第二框便宜1.2元．每千克梨多少元？
<gadget id="calculator">27 - 24</gadget>
<output>3</output>

<gadget id="calculator">1.2 / 3</gadget>
<output>0.4</output>

<result>0.4</result>