The floral cloth is 2.6 meters long, and the black cloth is 1.8 meters long. If you use them to make two pants of the same size, the remaining floral cloth is twice as long as the black cloth. How much rice cloth is used to make pants.
花布长2.6米，黑布长1.8米，如果用他们做两条大小相同的裤子，剩下的花布是黑布的2倍．做裤子一共用去多少米布．
<gadget id="calculator">1.8 * 2</gadget>
<output>3.6</output>

<gadget id="calculator">3.6 - 2.6</gadget>
<output>1</output>

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

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

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

<result>2</result>