The living room is 5 meters long and 3 meters wide. If square bricks with a side length of 5 decimeters are used to pave the floor, how many square bricks are needed?
客厅长5米，宽3米，如果用边长5分米的方砖铺地，共需要方砖多少块？
<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">15 / (1/4)</gadget>
<output>60</output>

<result>60</result>