Dad intends to pave the upper bricks for the bright little study, and it takes 90 square bricks with an area of 2 decimeters. If the square bricks with an area of 3 decimeters are used instead, how many square bricks are needed? (Solve with ratio)
爸爸打算给亮亮的小书房铺上方砖，用面积2平方分米的方砖需要90块，如果改用面积3平方分米的方砖，需要方砖多少块？(用比例解)
<gadget id="calculator">2 * 90</gadget>
<output>180</output>

<gadget id="calculator">180 / 3</gadget>
<output>60</output>

<result>60</result>