A road roller is 1.8 meters long and 1 meter in diameter. The roller of this road roller can rotate 15 times per minute. How many square meters can this road roller press per minute?
一台压路机滚筒长1.8米，直径1米，这台压路机的滚筒每分钟可转动15周，这台压路机每分钟可压路多少平方米？
<gadget id="calculator">3.14 * 1 * 1.8 * 15</gadget>
<output>84.78</output>

<result>84.78</result>