A toothpaste of a certain brand is 145mL, and the nozzle diameter is 7mm. Under normal circumstances, a person brushes his teeth twice a day, and squeezes out 2cm long each time. After the investigation of the toothpaste factory, it was found that it was a bit wasteful to use it according to the habit. In order to save resources, the diameter of the toothpaste nozzle was changed to 6mm. How much toothpaste can a person save every day?
某品牌的牙膏一支145mL，管口直径7mm，一般情况下，一个人每天刷牙2次，每次挤出2cm长．牙膏厂调查后发现按习惯使用有点浪费，为了节约资源就把牙膏管口直径改为为6mm，这样一个人每天可节约多少牙膏？
<gadget id="calculator">0.1225 - 0.09</gadget>
<output>0.0325</output>

<gadget id="calculator">3.14 * 2 * 0.0325 * 2</gadget>
<output>0.4082</output>

<result>0.4082</result>