A rectangular cistern is 8 meters long and 5 meters wide. Floor tiles with an area of 5 square decimeters are laid on the bottom of the pool. How many such floor tiles are needed?
一个长方形蓄水池，长8米，宽5米，在池底铺上面积为5平方分米的地板砖，需要多少块这样的地板砖？
<gadget id="calculator">8 / 0.05</gadget>
<output>160</output>

<gadget id="calculator">5 * 160</gadget>
<output>800</output>

<result>800</result>