There are three steel pipes. The length of the first steel pipe is 1.5 times the length of the second steel pipe and half the length of the third steel pipe. The third steel pipe is 1.6 meters longer than the second steel pipe. How long is the first steel pipe?
有三根钢管，第一根长是第二根长的1.5倍，是第三根长的一半，第三根比第二根长1.6米，第一根钢管有多长？
<gadget id="calculator">1.5 * 2</gadget>
<output>3</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">1.6 / 2</gadget>
<output>0.8</output>

<gadget id="calculator">1.5 * 0.8</gadget>
<output>1.2</output>

<result>1.2</result>