A cuboid tank is 10dm in length, 6dm in width, and 0.4m in height. Pour 150L of water into it. How many decimeters will the water be away from the mouth of the tank?
一个长方体水槽，长10dm，宽6dm，高0.4m，往里面倒入150L水，水离水槽口还有多少分米？
<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">150 / 60</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">4 - (5/2)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>