Wang Lixin bought a toothpaste with a net volume of 54 cubic centimeters, and the diameter of the circular outlet of the toothpaste is 6 mm. Wang Li brushes her teeth in the morning and evening, squeezing out about 2 centimeters each time. How many days is this toothpaste estimated to last. (take π=3)
王丽新买了一支净含量为54立方厘米的牙膏，牙膏圆形出口的直径是6毫米．王丽早晚各刷一次牙，每次挤出约2厘米长，这支牙膏估计能用多少天．(取π=3)
<gadget id="calculator">0.6 / 2</gadget>
<output>0.3</output>

<gadget id="calculator">0.3 ** 2</gadget>
<output>0.09</output>

<gadget id="calculator">3 * 0.09 * 2 * 2</gadget>
<output>1.08</output>

<gadget id="calculator">54 / 1.08</gadget>
<output>50</output>

<result>50</result>