A pole is 20 meters long. It got cut in a way that left it 30% shorter. How long is the pole?
The cut-away part of the pole is 30/100 * 20 = 
<gadget id="calculator">30/100*20</gadget>
<output>6</output>
6 meters long.
So the pole is left at the length of 20 - 6 = 
<gadget id="calculator">20-6</gadget>
<output>14</output>
14 meters.

<result>14</result>