When 45dm**3 water is poured into a cuboid water tank with a length of 5dm, a width of 3dm and a height of 4dm, how much dm will the water surface be from the mouth of the tank?
当45dm**3水倒入长为5dm、宽为3dm、高为4dm的长方体水箱内，水面离箱口还有多少dm．
<gadget id="calculator">3 * 5</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>