Cut a 12.15-meter-long iron wire into three sections. The first section is 3.7 meters long and 0.15 meters shorter than the second section. How many meters is the third section?
把一根长12.15米的铁丝截成三段，第一段长3.7米，比第二段短0.15米，第三段是多少米？
<gadget id="calculator">3.7 + 0.15</gadget>
<output>3.85</output>

<gadget id="calculator">12.15 - 3.85 - 3.7</gadget>
<output>4.6</output>

<result>4.6</result>