Xiao Ming is 1.3 meters tall, 0.2 meters shorter than Xiao Liang, and 0.2 meters taller than Xiao Dong. How many meters taller is Xiao Liang than Xiao Dong?
小明身高1.3米，比小亮矮0.2米，比小东高0.2米，小亮比小东高多少米？
<gadget id="calculator">1.3 + 0.2</gadget>
<output>1.5</output>

<gadget id="calculator">1.3 - 0.2</gadget>
<output>1.1</output>

<gadget id="calculator">1.5 - 1.1</gadget>
<output>0.4</output>

<result>0.4</result>