If the weight of the fish tail is 4 kg, the weight of the fish head is equal to the weight of the fish tail plus half of the fish body, and the weight of the fish body is equal to the weight of the fish head plus the fish tail, how many kilograms does this fish weigh?
如果鱼尾重4公斤，鱼头重量等于鱼尾加上鱼身一半的重量，鱼身重量等于鱼头加鱼尾的重量，这条鱼有多少公斤重．
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">8 / (1/2) / 2</gadget>
<output>8</output>

<gadget id="calculator">8 / (1/2)</gadget>
<output>16</output>

<gadget id="calculator">8 + 4 + 16 + 4</gadget>
<output>32</output>

<result>32</result>