The living room of Xiaoli’s house is 9 meters long and 4 meters wide. It is paved with tiles with a side length of 3 decimeters. At least how many tiles are needed?
小丽家的客厅长9米，宽4米，用边长为3分米的瓷砖去铺，至少需要几块这样的瓷砖？
<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">100 / 9</gadget>
<output>100/9 = around 11.111111</output>

<gadget id="calculator">9 * 4 * (100/9)</gadget>
<output>400</output>

<result>400</result>