Uncle Zhang’s family wants to pave the floor tiles for the newly bought house. It costs 1,500 yuan to pave the floor with square bricks with an area of 20 decimeters. (Solve with ratio)
张叔叔家要给新买的房子铺地板砖，用面积是20平方分米的方砖铺地，要用1500块，如果改用边长是5分米的方砖铺，要用多少块？(用比例解)
<gadget id="calculator">20 * 1_500</gadget>
<output>30_000</output>

<gadget id="calculator">5 * 5</gadget>
<output>25</output>

<gadget id="calculator">30_000 / 25</gadget>
<output>1_200</output>

<result>1_200</result>