Workers spread 10.5 cubic meters of yellow sand in a cuboid bunker with a length of 6 meters and a width of 3.5 meters. How thick can it be? (solution by equation)
工人把10.5立方米的黄沙铺在一个长6米、宽3.5米的长方体沙坑里，可以铺多厚？(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>