Xiao Ming is 1.55 meters tall, standing on a 0.5-meter-high chair, he is 0.16 meters taller than his father. How tall is dad?
小明身高1.55米，他站在0.5米高的椅子上比爸爸高出0.16米．爸爸身高多少米？
<gadget id="calculator">0.5 - 0.16</gadget>
<output>0.34</output>

<gadget id="calculator">1.55 + 0.34</gadget>
<output>1.89</output>

<result>1.89</result>