Three good friends made an appointment to go to the Children's Palace together. They each went from home to the Children's Palace. Xiaoming spent (3/4) hours, Xiaoqing spent (1/5) less than Xiaoming, and Xiaowang spent (1/10) more hours than Xiaoqing. How long did it take Xiao Wang to go from home to the Children's Palace?
三个好朋友约好一起去少年宫玩．他们各自从家去到少年宫，小明用了(3/4)小时，小青比小明少用(1/5)小时，小王比小青多花了(1/10)小时．小王从家去到少年宫用了多少时间？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) - (1/5)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(11/20) + (1/10)</gadget>
<output>13/20 = around 0.65</output>

<result>13/20 = around 0.65</result>