A community is building a metal fence. Each fence panel is made of 3 metal sheets, and 2 metal beams. The fence is made of 10 fence panels. If each sheet is made of 10 metal rods and each metal beam is made of 4 metal rods, how many metal rods does the community need for the fence?
In each panel, the metal sheets use 3 metal sheets * 10 metal rods = 
<gadget id="calculator">3*10</gadget>
<output>30</output>
30 metal rods.
In each panel, the metal beams use 2 metal beams * 4 metal rods = 
<gadget id="calculator">2*4</gadget>
<output>8</output>
8 metal rods.
So each panel uses 30 + 8 = 
<gadget id="calculator">30+8</gadget>
<output>38</output>
38 metal rods.
The entire fence therefore needs 38 metal rods * 10 fence panels = 
<gadget id="calculator">38*10</gadget>
<output>380</output>
380 metal rods.

<result>380</result>