Liangliang is 1.55 meters tall. When he stands on a chair with a height of 0.5 meters, he is 0.23 meters taller than his father. How tall is his father?
亮亮身高1.55米，他站在0.5米高的椅子上时，比爸爸高0.23米，爸爸身高多少米？
<gadget id="calculator">0.5 - 0.23</gadget>
<output>0.27</output>

<gadget id="calculator">1.55 + 0.27</gadget>
<output>1.82</output>

<result>1.82</result>