cuboid fish tank measures 5 decimeters in length, 7 decimeters in height and 3 decimeters in width from the inside. Now pour 150 liters of water into the fish tank. How many decimeters is the water surface from the edge of the fish tank?
一个长方体的鱼缸，从里面量长5分米、高7分米、宽3分米，现在往鱼缸内注入150升水，水面离鱼缸的沿口有多少分米？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">150 / 15</gadget>
<output>10</output>

<gadget id="calculator">10 - 7</gadget>
<output>3</output>

<result>3</result>