The height of the father is 1.72 meters, and the height of the mother is 1.57 meters. The son standing on the chair is the same height as the mother. The father standing on the chair is 0.48 meters taller than the mother. How many meters taller is the son? What is the simplest column formula.
父亲身高1.72米，母亲身高1.57米，儿子站在椅上与母亲同样高，父亲站在椅上比母亲高0.48米，儿子高几米？最简便的列式是多少．
<gadget id="calculator">1.72 - 0.48</gadget>
<output>1.24</output>

<result>1.24</result>