A 138.6-meter-long wire is cut into three sections. The first section is 37.58 meters long, the second section is 43.42 meters long, and how many meters is the third section?
一根长138.6米的电线，被剪成三段，第一段长37.58米，第二段长43.42米，第三段长多少米？
<gadget id="calculator">37.58 + 43.42</gadget>
<output>81</output>

<gadget id="calculator">138.6 - 81</gadget>
<output>57.6</output>

<result>57.6</result>