Mary, Edna, and Lucy are athletes who train every Saturday. Mary ran 3/8 of a 24-kilometer field on one Saturday. Edna ran 2/3 of the distance of Edna, and Lucy ran 5/6 of the distance of Edna. How many more kilometers should Lucy run to cover the same distance as Mary?
Mary ran 3/8 x 24 = 
<gadget id="calculator">3/8*24</gadget>
<output>9</output>
9 kilometers.
Edna ran 2/3 x 9 = 
<gadget id="calculator">2/3*9</gadget>
<output>6</output>
6 kilometers.
Lucy ran 5/6 x 6 = 
<gadget id="calculator">5/6*6</gadget>
<output>5</output>
5 kilometers.
Lucy should run 9 - 5 = 
<gadget id="calculator">9-5</gadget>
<output>4</output>
4 kilometers more.

<result>4</result>