Master Wang made a craft blanket by hand. He finished 20% of it on the first day and 25% of it on the second day. The next day weaved 0.2 meters more than the first day. How many meters is this blanket?
王师傅手工制作一条工艺毛毯，第一天完成了它的20%，第二天完成了它的25%，第二天比第一天多织了0.2米．这条毛毯长多少米？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/4) - (1/5)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">0.2 / (1/20)</gadget>
<output>4</output>

<result>4</result>