A house is 8 meters long and 5 meters wide. How many square tiles with a side length of 0.5 meters are needed to pave the floor?
一间房子长8米，宽5米．用边长0.5米的正方形瓷砖铺地，共需这种瓷砖多少块？
<gadget id="calculator">8 * 5</gadget>
<output>40</output>

<gadget id="calculator">0.5 * 0.5</gadget>
<output>0.25</output>

<gadget id="calculator">40 / 0.25</gadget>
<output>160</output>

<result>160</result>