brand of toothpaste has an outlet diameter of 4 mm. Xiao Ming squeezes out 1 cm of toothpaste every time he brushes his teeth. Such a toothpaste can be used 72 times. Recently, this brand of toothpaste has launched a new package, only changing the outlet diameter to 6 mm. , Xiao Ming is still used to squeeze out 1 cm toothpaste, so how many times can the same capacity of toothpaste be used?
一种品牌的牙膏出口直径为4毫米，小明每次刷牙都挤出1厘米长的牙膏，这样一支牙膏可用72次，最近这种品牌的牙膏推出新包装，只是将出口直径改为6毫米，小明还是习惯挤出1厘米牙膏，这样同样容量的牙膏能用多少次？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 1 * 10</gadget>
<output>282.6</output>

<gadget id="calculator">72 / 282.6</gadget>
<output>0.254777</output>

<gadget id="calculator">3.14 * 4 * 1 * 10 * 0.254777</gadget>
<output>31.999991</output>

<result>31.999991</result>