There are three iron wires. The first one is 3.5 meters long, which is 0.7 meters longer than the second one. The third one is 1.6 times longer than the second one. How many meters is the third wire long?
有三根铁丝，第一根长3.5米，比第二根长0.7米，第三根是第二根的1.6倍，第三根铁丝长多少米？
<gadget id="calculator">3.5 - 0.7</gadget>
<output>2.8</output>

<gadget id="calculator">2.8 * 1.6</gadget>
<output>4.48</output>

<result>4.48</result>