One morning, the fruit shop sells two baskets of bananas at the same unit price. The first basket of bananas weighs 13 kilograms, the second basket of bananas weighs 22 kilograms, and the second basket sells 33.3 yuan more than the first basket. The unit price of this kind of bananas is How much is a kilogram?
水果店某天上午以同样的单价卖出两筐香蕉，第一筐香蕉重13千克，第二筐香蕉重22千克，第二筐比第一筐多卖33.3元，这种香蕉的单价是每千克多少元？
<gadget id="calculator">22 - 13</gadget>
<output>9</output>

<gadget id="calculator">33.3 / 9</gadget>
<output>3.7</output>

<result>3.7</result>