A cuboid fish tank is 5 decimeters long, 4 decimeters wide, and 3 decimeters high. Inject 50 liters of water into the fish tank, how many decimeters is the water depth? (Glass thickness is ignored)
一个长方体鱼缸，长5分米，宽4分米，高3分米．在鱼缸里注入50升水，水深大约多少分米？(玻璃厚度忽略不计)
<gadget id="calculator">5 * 4</gadget>
<output>20</output>

<gadget id="calculator">50 / 20</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>