Master Zhang in the canteen went to the supermarket to buy hairtail at 12.3 yuan per kilogram. According to this calculation, the original price for buying 15 kilograms of hairtail can buy 5 kilograms more at the current price. How much is the price of hairtail per kilogram?
食堂的张师傅去超市买带鱼，每千克12.3元．照这样计算，原来买15千克带鱼的钱按现价可以多买5千克．原来每千克带鱼售价多少元？
<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<gadget id="calculator">20 / 15</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">12.3 * (4/3)</gadget>
<output>16.4</output>

<result>16.4</result>