Using the same square bricks to pave the ground, 60 bricks are needed to pave the ground of 2160 square decimeters. If the ground of 1800 square decimeters is paved, how many such square bricks are needed? (Solve with ratio)
用同样的方砖铺地，铺2160平方分米的地面需要60块，如果铺1800平方分米的地面，需要这样的方砖多少块？(用比例解)
<gadget id="calculator">2_160 / 60</gadget>
<output>36</output>

<gadget id="calculator">1_800 / 36</gadget>
<output>50</output>

<result>50</result>