Dad is 1.76 meters tall, Xiao Ming is 1.45 meters tall, and Xiao Ming is 0.24 meters taller than his father standing on the stool. How high is the stool?
爸爸身高1.76米，小明身高1.45米，小明站在凳子上比爸爸高0.24米．凳子有多高？
<gadget id="calculator">0.24 - 1.45</gadget>
<output>-1.21</output>

<gadget id="calculator">1.76 + (-1.21)</gadget>
<output>0.55</output>

<result>0.55</result>