A building has 25 floors, each floor has 16 windows, and each window has 4 panes of glass. How many panes of glass does this building have?
一座大楼有25层，每层有16个窗口，每个窗口有4块玻璃，这座大楼一共有多少块玻璃？
<gadget id="calculator">4 * 16 * 25</gadget>
<output>1_600</output>

<result>1_600</result>