There is a large shark with a body length of 19.2. Its body length is equal to the head length plus the tail length, and its tail length is equal to half the body length plus the head length. How many meters is the head of this big shark?
有一条身长19.2的大鲨鱼，它的身长等于头长加尾长，它的尾长等于身长的一半加上头长．这条大鲨鱼的头长多少米？
<gadget id="calculator">19.2 / 2</gadget>
<output>9.6</output>

<gadget id="calculator">19.2 - 9.6</gadget>
<output>9.6</output>

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

<gadget id="calculator">9.6 / 2</gadget>
<output>4.8</output>

<result>4.8</result>