The fire truck is equipped with a water tank with a length, width and height of 4.5 meters, 2.4 meters and 1.2 meters respectively. The high-pressure water gun used for fire extinguishing has a round mouth radius of 4 centimeters and sprays water at 1 meter per second. How many minutes can a fire truck be used to put out a fire? (π takes 3)
消防车装配的是长、宽、高分别为4.5米、2.4米、1.2米的水箱，灭火用的高压水枪出水圆口半径为4厘米，每秒喷水1米．请问一辆消防车可用于灭火多少分钟？(π取3)
<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">(1/25) ** 2</gadget>
<output>1/625 = around 0.0016</output>

<gadget id="calculator">3 * (1/625) * 1</gadget>
<output>3/625 = around 0.0048</output>

<gadget id="calculator">1.2 / (3/625) / 60</gadget>
<output>4.166667</output>

<gadget id="calculator">4.5 * 2.4 * 4.166667</gadget>
<output>45.000004</output>

<result>45.000004</result>