Two pieces of wood, the longer one is 3.2 meters long and the shorter one is 2.5 meters long. After sawing two pieces of wood to the same length, of the remaining two pieces of wood, the length of the longer piece of wood is required to be at least twice the length of the shorter piece of wood. So, what is the minimum length of sawn wood?
两根木材，较长的一根长3.2米，较短的一根长2.5米．把两根木材锯掉相同的长度后，剩下的两根木材中，要求较长的木材长度不小于较短木材的长度的两倍．那么，锯掉的木材长度至少是多少米．
<gadget id="calculator">3.2 - 2.5</gadget>
<output>0.7</output>

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

<gadget id="calculator">0.7 / 1</gadget>
<output>0.7</output>

<gadget id="calculator">2.5 - 0.7</gadget>
<output>1.8</output>

<result>1.8</result>