He is obviously 1.42 meters tall, but he stands on a stool with a height of 0.57 meters, which is 0.2 meters taller than his father. How tall is dad?
明明身高1.42米，他站在高0.57米的凳子上，比爸爸高0.2米．爸爸身高多少米？
<gadget id="calculator">0.57 - 0.2</gadget>
<output>0.37</output>

<gadget id="calculator">1.42 + 0.37</gadget>
<output>1.79</output>

<result>1.79</result>