A rectangular swimming pool is 60 meters long and 30 meters wide. How many square bricks are needed to lay 9 square decimeters on the bottom of the pool?
一个长方形的游泳池，长60米，宽30米，要在池底铺面积为9平方分米的方砖，需要多少块？
<gadget id="calculator">30 / 0.09</gadget>
<output>333.333333</output>

<gadget id="calculator">60 * 333.333333</gadget>
<output>19_999.99998</output>

<result>19_999.99998</result>