The school uses 10.5 cubic meters of yellow sand to spread in a bunker that is 6 meters long and 3.5 meters wide. How many meters thick can the yellow sand be spread? (solution by equation)
学校用10.5立方米的黄沙，铺在一个长6米、宽3.5米的沙坑里，黄沙可以铺多少米厚？(用方程解)
<gadget id="calculator">6 * 3.5</gadget>
<output>21</output>

<gadget id="calculator">10.5 / 21</gadget>
<output>0.5</output>

<result>0.5</result>