A piece of wood was sawn off 4.8 meters, leaving 7.5 meters. How many meters was this piece of wood originally?
一段木头，锯下4.8米，还剩7.5米．这段木头原来长多少米？
<gadget id="calculator">4.8 + 7.5</gadget>
<output>12.3</output>

<result>12.3</result>