Xiao Ming has traveled (2/5) kilometers from home to school, which is less than the remaining (1/4) kilometers. How far is it from Xiao Ming's home to school?
小明从家去学校，已行了(2/5)千米，已行比剩下的少(1/4)千米，小明家到学校多远？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) + (1/4) + (2/5)</gadget>
<output>21/20 = around 1.05</output>

<result>21/20 = around 1.05</result>