A knapsack sprayer, its cuboid medicine box is 30 cm long, 15 cm wide, and 40 cm high from the inside. If the sprayer sprays 600 mL of liquid medicine per minute, how many minutes does it take to spray a box of liquid medicine?
一种背负式喷雾器，它的长方体药箱从里面量长30厘米，宽15厘米，高40厘米，如果喷雾器每分钟喷出药液600mL，喷完一箱药液需用多少分钟？
<gadget id="calculator">30 * 15 * 40</gadget>
<output>18_000</output>

<gadget id="calculator">18_000 / 600</gadget>
<output>30</output>

<result>30</result>