Xiaozhen is 1.23 meters tall, Xiaohai is 0.02 meters taller than Xiaozhen, and Xiaojun is 0.01 meters shorter than Xiaohai. How tall is Xiaojun?
小真身高1.23米，小海比小真高0.02米，小军比小海矮0.01米．小军身高多少米？
<gadget id="calculator">0.02 - 0.01</gadget>
<output>0.01</output>

<gadget id="calculator">1.23 + 0.01</gadget>
<output>1.24</output>

<result>1.24</result>