Hope Primary School has newly built a 4-story teaching building with 8 classrooms on each floor and 45 desks in each classroom. How many desks does Hope Primary School need in total?
希望小学新盖了一幢4层教学楼，每层8个教室，每个教室要放45张课桌，希望小学一共需要多少张课桌？
<gadget id="calculator">4 * 8 * 45</gadget>
<output>1_440</output>

<result>1_440</result>