The school spreads 6 cubic meters of yellow sand in a bunker with a length of 4 meters and a width of 3 meters. How many meters should the average thickness of the sand be?
学校在一个长4米、宽3米的沙坑内铺上6立方米的黄沙，黄沙的平均厚度应该是多少米？
<result>1.5</result>