To paint a wall that is 72 meters long and 3 meters wide, if the cost of painting is 18 yuan per square meter, how much does it cost to paint the wall?
要粉刷一面长72米，宽3米的墙面，如果每平方米的粉刷费用是18元，那么粉刷这面墙要多少钱？
<gadget id="calculator">72 * 3 * 18</gadget>
<output>3_888</output>

<result>3_888</result>