A living room is 8 meters long and 4 meters wide. If floor tiles with a side length of 2 decimeters are laid, how many floor tiles are needed in total?
一个客厅长8米宽4米，如果铺上边长2分米的地砖，一共需要多少地砖．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">8 * 4 * 25</gadget>
<output>800</output>

<result>800</result>