Fulin Community is undergoing road surface reconstruction. The diameter of the roller is 0.8 meters and the length is 1.5 meters. If the roller rotates 50 times per minute, how many square meters of road surface can this roller press per minute?
福林小区进行路面改造，压路机的滚筒直径是0.8米，长1.5米，如果这个滚筒每分钟转50周，这台压路机每分钟能压路面多少平方米？
<gadget id="calculator">3.14 * 0.8 * 50 * 1.5</gadget>
<output>188.4</output>

<result>188.4</result>