A classroom is 12 meters long and 5 meters wide, and how many tiles are needed to pave the floor with a side length of 2 decimeters?
一间教室长12米、宽5米，用边长2分米的地砖铺地面，需要多少块？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

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

<gadget id="calculator">12 * 5 * 25</gadget>
<output>1_500</output>

<result>1_500</result>