There are two wires, the first one is 28 meters long, which is 2.3 meters less than three times the second one, how long is the second wire in meters?
有两根电线，第一根长28米，比第二根的3倍少2.3米，第二根电线长多少米？
<gadget id="calculator">28 + 2.3</gadget>
<output>30.3</output>

<gadget id="calculator">30.3 / 3</gadget>
<output>10.1</output>

<result>10.1</result>