The glass window is 4 meters long and 3 meters wide. The glass plate is 68 yuan per square meter. How much is the total cost of installing the glass on these 3 windows?
玻璃窗长4米，宽3米．每平方米玻璃板68元，安装这样3个窗户上的玻璃，一共需要多少元？
<gadget id="calculator">4 * 3 * 68 * 3</gadget>
<output>2_448</output>

<result>2_448</result>