Teacher Wang traveled 10 kilometers per hour when going from home to school, and 6 kilometers per hour when returning. It took (4/5) hours to go back and forth. How many kilometers is the distance from Mr. Wang's home to the school?
王老师从家到学校，去时每小时行10千米，返回时每小时行6千米，往返共用了(4/5)小时．王老师的家到学校相距多少千米？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">10 * (4/5) * (3/8)</gadget>
<output>3</output>

<result>3</result>