Xiao Ming is 1.21 meters tall, 0.4 meters shorter than Hong Hong, how many meters is Hong Hong tall?
小明身高1.21米，比红红矮0.4米，红红身高多少米？
<gadget id="calculator">1.21 + 0.4</gadget>
<output>1.61</output>

<result>1.61</result>