The sidewalk is 150 meters long and 50 decimeters wide. It needs to be paved with 30 decimeters of cement bricks. How many cement bricks are needed to cover this sidewalk?
人行道长150米，宽50分米，要用30平方分米的水泥砖铺地，铺满这条人行道需要这样水泥砖多少块？
<gadget id="calculator">150 * 10</gadget>
<output>1_500</output>

<gadget id="calculator">50 / 30</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">1_500 * (5/3)</gadget>
<output>2_500</output>

<result>2_500</result>