Xiaoming is 1.43 meters tall. Standing on a 0.2-meter-high step, he is 0.17 meters taller than his mother. How tall is his mother?
小明身高度1.43米，他站在0.2米高的台阶上，比妈妈高0.17米，妈妈身高多少米？
<gadget id="calculator">0.2 - 0.17</gadget>
<output>0.03</output>

<gadget id="calculator">1.43 + 0.03</gadget>
<output>1.46</output>

<result>1.46</result>