The length of a house is 160 decimeters and the width is 60 decimeters. If you use square floor tiles with a side length of 20 cm to pave the floor, how many floor tiles are needed?
一间房子的长是160分米，宽是60分米，如果用边长为20厘米的正方形地板砖铺地，需要多少块地板砖？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 * (1/5)</gadget>
<output>4</output>

<gadget id="calculator">60 / 4</gadget>
<output>15</output>

<gadget id="calculator">160 * 15</gadget>
<output>2_400</output>

<result>2_400</result>