In a triangular vegetable field, the first side is 28.5 meters long, the second side is 8.15 meters long, and the third side is 3.45 meters longer than the second side. How many meters will the fence be around?
一块三角形菜地，第一条边长28.5米，第二条边长8.15米，第三条边长比第二条边长3.45米．要在周围围上篱笆，篱笆长多少米？
<gadget id="calculator">8.15 + 3.45</gadget>
<output>11.6</output>

<gadget id="calculator">28.5 + 8.15 + 11.6</gadget>
<output>48.25</output>

<result>48.25</result>