The wall mirror in the school dance room is 5 meters long and 3 meters wide, and costs 90 yuan per square meter. How much does it cost to buy this wall mirror?
学校舞蹈房的壁镜长5米，宽3米，每平方米90元，买这面壁镜一共要花多少钱？
<gadget id="calculator">5 * 3 * 90</gadget>
<output>1_350</output>

<result>1_350</result>