The floor of the classroom is 8 meters long and 7 meters wide. If square bricks with an area of 4 square decimeters are used to pave the floor, how many square bricks are needed?
教室地面长8米，宽7米，如果用面积是4平方分米的方砖铺地，需要多少块这样的方砖？
<gadget id="calculator">8 * 10</gadget>
<output>80</output>

<gadget id="calculator">7 * 10</gadget>
<output>70</output>

<gadget id="calculator">70 / 4</gadget>
<output>35/2 = around 17.5</output>

<gadget id="calculator">80 * (35/2)</gadget>
<output>1_400</output>

<result>1_400</result>