Li Ming and Zhang Fang went from school to the Children's Palace at the same time. When Li Ming walked the whole distance (2/5), Zhang Fang walked 2.4km; when Li Ming arrived at the Children's Palace, Zhang Fang walked the whole distance (15/16). How many kilometers is the total length from the school to the Children's Palace?
李明和张方同时从学校到少年宫，当李明走了全程的(2/5)时，张方走了2.4km；当李明到达少年宫时，张方走了全程的(15/16)．学校到少年宫全长多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">15 / 16</gadget>
<output>15/16 = around 0.9375</output>

<gadget id="calculator">1 / (15/16)</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">(2/5) / (16/15)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2.4 / (3/8)</gadget>
<output>6.4</output>

<result>6.4</result>