Divide a fish into three parts. The tail weighs 5 kg. The head is 1/2 of the body. The body is equal to the weight of the head plus the three tails. What is the weight of the whole fish in kg?
把一条鱼分成三份，鱼尾重5千克，鱼头是鱼身的(1/2)，鱼身等于鱼头加上三个鱼尾的重量，求整条鱼的重量是多少千克？
<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">15 / 1</gadget>
<output>15</output>

<gadget id="calculator">2 * 15</gadget>
<output>30</output>

<gadget id="calculator">15 + 30 + 5</gadget>
<output>50</output>

<result>50</result>