Lee used to be able to run the 400-meter hurdles two seconds faster than Gerald would run the 400-meter hurdles.  But Gerald changed his diet, which improved his speed by 10%.  If Lee runs the 400-meter hurdles in 38 seconds, how fast can Gerald, with his improved diet, run the 400-meter hurdles, in seconds?
If Lee runs the 400-meter hurdles in 38 seconds, which was two seconds faster than Gerald used to run the 400-meter hurdles, then Gerald initially would run the 400-meter hurdles in 38+2=
<gadget id="calculator">38+2</gadget>
<output>40</output>
40 seconds.
10% of 40 seconds is 40*0.1=
<gadget id="calculator">40*0.1</gadget>
<output>4</output>
4 seconds.
The improved diet reduced Gerald's race time to 40-4=
<gadget id="calculator">40-4</gadget>
<output>36</output>
36 seconds.

<result>36</result>