The road construction team wants to build a road with a length of 1000m and a width of 6m, and pave it with 30cm thick concrete. How many cubic meters of concrete is needed at least?
修路队要修一条长1000m、宽6m的公路，铺30cm厚的混凝土，至少需要混凝土多少立方米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">100 * 6 * (3/10)</gadget>
<output>180</output>

<result>180</result>