The science and technology team bought a bundle of wires, used 28.6 meters, and left 12.7 meters more than what was used. How long is this bundle of wires?
科技小组买来一捆电线，用去28.6米，剩下的比用去的多12.7米．这捆电线原来长多少米？
<gadget id="calculator">28.6 + 12.7</gadget>
<output>41.3</output>

<gadget id="calculator">28.6 + 41.3</gadget>
<output>69.9</output>

<result>69.9</result>