The floor of a classroom is 10 meters long and 80 decimeters wide. If the floor is paved with floor tiles with a side length of 2 decimeters, how many floor tiles are needed in total?
一间教室的地面长10米，宽80分米，如果用边长2分米的地砖铺地，一共需要多少块地砖？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">10 * 10 * 20</gadget>
<output>2_000</output>

<result>2_000</result>