A paint roller is 2.4 decimeters long and 0.5 decimeters in diameter. If it rolls 100 times, how many square decimeters can it paint the wall?
一个刷油漆的滚筒长2.4分米，直径为0.5分米．如果它滚动100周，能刷墙多少平方分米？
<gadget id="calculator">3.14 * 0.5 * 2.4 * 100</gadget>
<output>376.8</output>

<result>376.8</result>