Spread 4 cubic meters of yellow sand in a bunker covering an area of 6.4 square meters, how many meters can be spread.
将4立方米的黄沙铺在占地6.4平方米的沙坑里，可铺多少米厚．
<gadget id="calculator">4 / 6.4</gadget>
<output>0.625</output>

<result>0.625</result>