The Palace of Light and Youth is going to lay floor tiles for the 50.8-meter-long and 30-meter-wide theater. If you use 0.4 square meters of square bricks to pave the floor, how many pieces of this kind of square bricks are needed?
光和青少年宫准备给长50.8米、宽30米的剧场铺地砖．如果用每块0.4平方米的方砖铺地，需要这种方砖多少块？
<gadget id="calculator">30 / 0.4</gadget>
<output>75</output>

<gadget id="calculator">50.8 * 75</gadget>
<output>3_810</output>

<result>3_810</result>