Mark can jump 6 inches off the ground. Lisa can jump double the height as Mark, and Jacob can jump double the height of Lisa. If James jumps 2/3 as high Jacob, how high can James jump?
Lisa can jump 6*2 =
<gadget id="calculator">6*2</gadget>
<output>12</output>
12 inches.
Jacob can jump 12 *2 = 
<gadget id="calculator">12*2</gadget>
<output>24</output>
24 inches.
James can jump 24*(2/3)= 
<gadget id="calculator">24*(2/3)</gadget>
<output>16</output>
16 inches high.

<result>16</result>