The school spreads 10.5m**3 yellow sand in a cuboid bunker with a length of 6m and a width of 3.5m. How thick can it be? (with equation)
学校把10.5m**3黄沙铺在一个长6m、宽3.5m的长方体沙坑里，可以铺多厚？(用方程)
<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>