Yucai School expanded the school building with an investment of 372,000 yuan, which resulted in a savings of 28,000 yuan compared with the original planned investment. How much was the savings?
育才学校扩建校舍，投资37.2万元，结果比原计划投资节约了2.8万元，节约多少
<gadget id="calculator">37.2 + 2.8</gadget>
<output>40</output>

<gadget id="calculator">2.8 / 40</gadget>
<output>0.07</output>

<result>0.07</result>