If a house is paved with square bricks with a side length of 8 decimeters, 90 pieces are needed. If the square bricks with a side length of 12 decimeters are used instead, how many pieces are needed? (proportional knowledge answer)
一间房子铺地砖，用边长是8分米的方砖，需要90块，如果改用边长是12分米的方砖，需要多少块？(比例知识解答)
<gadget id="calculator">8 * 8 * 90</gadget>
<output>5_760</output>

<gadget id="calculator">12 * 12</gadget>
<output>144</output>

<gadget id="calculator">5_760 / 144</gadget>
<output>40</output>

<result>40</result>