Xiaopeng's home, school, and library are on the same street. Xiaopeng rides a bicycle from home to school at a speed of (7/3) kilometers per hour, then turns around and goes to the library. It takes 2 hours (the turn-around time is not counted) , and know that the distance between Xiaopeng’s home and the library is (4/3) kilometers, how many kilometers is the distance between Xiaopeng’s home and the school?
小鹏家、学校、图书馆在同一条街道上，小鹏骑自行车以每小时(7/3)千米的速度从家到学校，然后掉头再去图书馆，共用2小时(掉头时间不计)，又知小鹏家离图书馆的距离是(4/3)千米，求小鹏家到学校的距离是多少千米？
<gadget id="calculator">7 / 3</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">(7/3) * 2</gadget>
<output>14/3 = around 4.666667</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(14/3) - (4/3)</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(10/3) / 2</gadget>
<output>5/3 = around 1.666667</output>

<result>5/3 = around 1.666667</result>