Decorate a house and pave the floor with floor tiles. 96 square bricks with an area of 9dm**2 are needed. If the square bricks with an area of 4dm**2 are used instead, how many bricks are needed? (solution by equation)
装饰一间房子，用地砖铺地．用面积是9dm**2的方砖需要96块，如果改用面积是4dm**2的方砖，需要多少块？(用方程解)
<gadget id="calculator">9 * 96</gadget>
<output>864</output>

<gadget id="calculator">864 / 4</gadget>
<output>216</output>

<result>216</result>