The park is going to build a fence with a length of 10 meters, a thickness of 2 decimeters, and a height of 3 meters. If 520 bricks are used per cubic meter. How many bricks are there in this wall?
公园准备修一道长10米，厚2分米，高3米的围墙．如果每立方米用砖520块．这道围墙一共用砖多少块？
<gadget id="calculator">2 / 10</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">10 * (1/5) * 3 * 520</gadget>
<output>3_120</output>

<result>3_120</result>