Pour 45 liters of water into a fish tank with a length of 5 decimeters, a width of 3 decimeters, and a height of 4 decimeters. How many decimeters will the water surface be from the top of the tank?
把45升水倒入长5分米、宽3分米、高4分米的鱼缸内，水面距缸顶还有多少分米？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">45 / 15</gadget>
<output>3</output>

<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<result>1</result>