There are 500 tons of cement in the warehouse of the cement factory. Team A can transport 12% of the total at one time, and team B can transport 20% of the total at one time. If two convoys are allowed to transport together, how many tons of cement can be transported at one time?
水泥厂仓库里有水泥500吨，甲车队一次可以运走总数的12%，乙车队一次可运走总数的20%．如果让两个车队一起来运，一次共可运走多少吨水泥？
<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/25) + (1/5)</gadget>
<output>8/25 = around 0.32</output>

<gadget id="calculator">500 * (8/25)</gadget>
<output>160</output>

<result>160</result>