Spread 4 cubic meters of yellow sand in a bunker covering an area of 80 square meters, how many meters can be spread.
将4立方米的黄沙铺在占地80平方米的沙坑里，可铺多少米厚．
<gadget id="calculator">4 / 80</gadget>
<output>1/20 = around 0.05</output>

<result>1/20 = around 0.05</result>